Question

class 7 exponents and powers L-13
3) simplify the following -
a) 3^{2} x (-10)^{2]
b)$\frac{ (-23)^5}{(-23)^3}$

Answer 1

Hello friends!!

Here is your answer :

a)
${3}^{2} \times {( - 10)}^{2}$

We know that,

${a}^{p} \times {b}^{p} = {ab}^{p}$


$= > {(3 \times - 10)}^{2}$


$= > {( - 30)}^{2}$


$= > 900$


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b)
$\frac{ {( - 23)}^{5} }{ {( - 23)}^{3} }$

We know that,

${a}^{p} \div {a}^{q} = {a}^{p - q}$


$= > {( - 23)}^{5 - 3}$


$= > {( - 23)}^{2}$


$= > 529$


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Hope it helps you...

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