Algebraic Expressions and Identities — Maths STD 8 — Question
Maharashtra BoardEnglish MediumSTD 8MathsAlgebraic Expressions and Identities2 Marks
Question
Find the following products:
$\left(x^2+4\right)\left(x^2+9\right)$
✓
Answer
Here, we will use the identity $(x+a)(x+b)=x^2+(a+b) x+a b$.
$\left(x^2+4\right)\left(x^2+9\right)$
$=\left(x^2\right)^2+(4+9)\left(x^2\right)+4 \times 9$
$=x^4+13 x^2+36$
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