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Exponents with Like Bases

Question 7iii...

Question

Question 7(iii)
Simplify:
(iii) $(- 3)^{2} \times (- 5)^{2}$

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Solution

(iii) $(- 3)^{2} \times (- 5)^{2}$

= $(- 3) \times (- 3) \times (- 5) \times (- 5)$

= $(9) \times (25)$ ( $(- 1)^{e v e n n u m b e r} = 1$ )

= $225$

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Question 6(iii)
Simplify:
(iii) $2^{3} \times 5$

Question 180(vi)

Simplify :
$\frac{(3^{- 2})^{2} \times (5^{2})^{- 3} \times (t^{- 3})^{2}}{(3^{- 2})^{5} \times (5^{3})^{(- 2)} \times (t^{- 4})^{3}}$

Question 180(vi)

Simplify :
$\frac{(3^{- 2})^{2} \times (5^{2})^{- 3} \times (t^{- 3})^{2}}{(3^{- 2})^{5} \times (5^{3})^{(- 2)} \times (t^{- 4})^{3}}$

Question 21

Which of the following is not true?
(a) $3^{2} > 2^{3}$
(b) $4^{3} = 2^{6}$
(c) $3^{3} = 9$
(d) $2^{5} > 5^{2}$

{(- 3)}^{2} \times {(- 5)}^{2}

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Exponents with Like Bases

Standard VII Mathematics

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