Algebraic Expressions and Identities — Maths STD 8 — Question
Maharashtra BoardEnglish MediumSTD 8MathsAlgebraic Expressions and Identities2 Marks
Question
Find the following products:
$\left(y^2+12\right)\left(y^2+6\right)$
✓
Answer
Here, we will use the identity $(x+a)(x+b)=x^2+(a+b) x+a b$.
$\left(y^2+12\right)\left(y^2+6\right)$
$=\left(y^2\right)^2+(12+6)\left(y^2\right)+12 \times 6$
$=y^4+18 y^2+72$
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