Question 73 MarksFactorise : $5-\left(3 x^2-2 x\right)\left(6-3 x^2+2 x\right)$Answer$(1+3 x)(1-x)(1+x)(5-3 x)$[Hint. Put $3 x^2-2 x=y$ ]View full question & answer→
Question 83 MarksFactorise : $a^4-11 a^2+10$Answer$\left(a^2-10\right)(a+1)(a-1)$View full question & answer→
Question 103 MarksFactorise : $\left(a^2-a\right)\left(4 a^2-4 a-5\right)-6$Answer$(a-2)(a+1)\left(4 a^2-4 a+3\right)$View full question & answer→
Question 113 MarksFactorise : $\left(a^2-3 a\right)\left(a^2-3 a+7\right)+10$Answer$\left(a^2-3 a+5\right)(a-2)(a-1)$View full question & answer→
Question 123 MarksFactorise : $4(2 a-3)^2-3(2 a-3)(a-1)-7(a-1)^2 \quad$Answer$(a-5)(3 a-4)$[Hint. Put $(2 a-3)=x$ and $(a-1)=y$.]View full question & answer→
Question 133 MarksFactorise : $8(a-2 b)^2-2 a+4 b-1$Answer$(2 a-4 b-1)(4 a-8 b+1)$View full question & answer→
Question 143 MarksFactorise : $(a+4)^2-5 a b-20 b-6 b^2$Answer$(a+4-6 b)(a+4+b)$View full question & answer→
Question 153 MarksFactorise : $1-2(a+2 b)-3(a+2 b)^2$Answer$(1-3 a-6 b)(1+a+2 b)$View full question & answer→
Question 163 MarksFactorise : $3(2 a-b)^2-19(2 a-b)+28$Answer$(2 a-b-4)(6 a-3 b-7)$View full question & answer→
Question 173 MarksFactorise : $5(3 a+b)^2+6(3 a+b)-8$Answer$(3 a+b+2)(15 a+5 b-4)$View full question & answer→
Question 183 MarksFactorise : $5 x^2+17 x y-12 y^2$Answer$(x+4 y)(5 x-3 y)$View full question & answer→
Question 333 MarksFactorise : $2 x^4-32$Answer$2\left(x^2+4\right)(x+2)(x-2)$View full question & answer→
Question 343 MarksFactorise : $x^4-81$Answer$\left(x^2+9\right)(x+3)(x-3)$View full question & answer→
Question 383 MarksFactorise $\left(x^4+x^2 y^2+y^4\right)$Answer$\left(x^2+y^2+x y\right)\left(x^2+y^2-x y\right)$[Hint. Given Exp. $=\left(x^4+2 x^2 y^2+y^4\right)-\left(x^2y^2\right)=\left(x^2+y^2\right)^2-(x y)^2$.View full question & answer→
Question 413 MarksExpress $\left(x^2+8 x-15\right)\left(x^2-8 x-15\right)$ as the difference of two squares.Answer$\left(x^2-15\right)^2-(8 x)^2$View full question & answer→
Question 423 MarksFactorise : $9 a^2+3 a-8 b-64 b^2$Answer$(3 a-8 b)(3 a+8 b+1)$[Hint. Given Exp. $=\left(9 a^2-64 b^2\right)+(3 a-8 b)$ ]View full question & answer→
Question 443 MarksFactorise : $4 x^2-12 a x-y^2-z^2-2 y z+9 a^2$Answer$(2 x-3 a+y+z)(2 x-3 a-y-z)$[Hint. Given Exp. $\left.=\left(4 x^2-12 a x+9 a^2\right)-\left(y^2+z^2+2 y z\right)\right]$View full question & answer→
Question 453 MarksFactorise : $\left(a^2-b^2\right)\left(c^2-d^2\right)-4 a b c d$Answer$(a c-b d+a d+b c)(a c-b d-a d-b c)$[Hint. Given Exp. $\left.=(a c-b d)^2-(a d+b c)^2\right]$View full question & answer→
Question 463 MarksFactorise : $a^2+b^2-c^2-d^2+2 a b-2 c d$Answer$(a+b+c+d)(a+b-c-d)$View full question & answer→
Question 473 MarksFactorise : $x^4+5 x^2+9$Answer$\left(x^2+3+x\right)\left(x^2+3-x\right) 2$[Hint. Add and subtract $x^2$ ]View full question & answer→
Question 483 MarksFactorise : $x^2+\frac{1}{x^2}-11$Answer$\left(x-\frac{1}{x}+3\right)\left(x-\frac{1}{x}-3\right)$[Hint. Given Exp. $=\left(x^2+\frac{1}{x^2}-2\right)-9$ ]View full question & answer→
Question 493 MarksFactorise : $9 x^4-x^2-12 x-36$Answer$\left(3 x^2+x+6\right)\left(3 x^2-x-6\right)$View full question & answer→