Question

(82)²,Find the value using expansion formulae of (a+b)² or (a-b)².

Answer 1

BONJOUR,
❤ ❤ ❤ ❤ ❤
we can write this like (80+2)^2
$(80 + 2) { }^{2} \\ = 80 { }^{2} + 2 \times 80 \times 2 + 2 {}^{2} \\ = 6400 + 320 + 4 \\ = 6724$

Answer 2

$\textbf {Hey there, here is the solution.}$

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(82)²

.

Write it in expanded form:

= (80 + 2)²

.

Apply (a + b)² = a² + 2ab + b²:

= (80)² + 2(80)(2) + (2)²

.

Evaluate each bracket:

= 6400 + 320 + 4

.

Sum them up:

= 6724

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Answer: 6724

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⭐$\textbf {Cheers}$⭐