Question

Evaluate by using identity 78²– 88²​

Answer 1

Step-by-step explanation:

this is not the exact..but may help....

Answer 2

Answer:

-1660

Step-by-step explanation:

78² - 88²

[a² - b² = (a + b)(a - b)]

(78 + 88)(78 - 88)

= 166 x (-10)

= -1660

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