Download App

Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsPolynomials1 Mark
Question
Expand using appropriate identity: $(-2 x+5 y-3 z)^2$
✓

Answer

$(-2 x+5 y-3 z)^2$
$=\{(-2 x)+5 y+(-3 z)\}^2$
$=(-2 x)^2+(5 y)^2+(-3 z)^2+2(-2 x)(5 y)+2(5 y)(-3 z)+2(-3 z)(-2 x)$
$=4 x^2+25 y^2+9 z^2-20 x y-30 y z+12 z x$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "1 Marks Question" from Polynomials→Polynomials — all question types→Maths STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Which of the following expression are polynomials? $\frac{(\text{x}-2)(\text{x}-4)}{\text{x}}$
→
Classify the following number as rational or irrational. give reasons to support your answer. $3.040040004...$
→
Can all the four angles of a quadrilateral be obtuse angles? Give reason for your answer.
→
Write the equation representing $y-$axis.
→
Classify the following numbers as rational or irrational with justification: $1.010010001...$
→
For the following points, write the quadrant in which it lies.
$(-3,8)$
→
If $x+y+z=0$ then show that $x^3+y^3+z^3=3 x y z$.
→
If the bisectors of two adjacent angles $A$ and $B$ of a quadrilateral $A B C D$ intersect at a point $O$ such that $\angle C+\angle D=k \angle A O B$, then find the value of $k$.
→
Find: $125^{-1 / 3}$
→
Factorise:
$x^2-x y+y-x$
→