Question

Evaluate using identities (75)²
(please give answer the step by step!)

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Answer 1

$(75) {}^{2} = (70 + 5) {}^{2}$

Using the identity

(a+b)²=(a)²+(b)²+2(a)(b)

(70+5)²=(70)²+(5)²+2(70)(5)

=4900+25+700

=5625

$(75) {}^{2} = 5625$