Question

evaluate 9^2-7^2 using sutable identities​

Answer 1

Answer:

The answer is 32

Step-by-step explanation:

9^2 - 7^2 can be put in a^2 and b^2 formula.

i.e. (a+b)(a-b)

Put 9 in place of a and 7 in place of b

(9+7)(9-7)

16×2

=32

Answer 2

Answer:

${9}^{2} - {7}^{2} \\ = (9 - 7)(9 + 7) \\ = 2 \times 16 \\ = 32$