Question

Q6. Using Identities, find the following


3) (x+3)(x+5)​

Answer 1

$\textit{\underline{\underline{\large{\pink{Step by step Explanation:-}}}}}$

$\textit{\underline{Using Identity,,}}$

$\mathit{\boxed{\green{(x+a)(x+b)=x^{2}+(a+b)x+ab}}}$

$\textit{\underline{Since,,}}$

$\mathrm{(x+3)(x+5)}$

$\mathrm{=x^{2}+(3+5)x+3\times 5}$

$\mathrm{=x^{2}+8x+15}$

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Answer 2

Step by step explanation :

(x+3) (x+5)

= (x)² + ( a+b )x + ab { using (x+a)(x+b) }

= x² + (3 +5) x + 3.5

= x² + 8x+ 15

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