Question

Evaluate:- (49)^2.


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Answer 1

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$<p style="color:blue;font-family:cursive;background:pink;font-size:30px;"> (-49)^2=2401<p>$

Answer 2

Step-by-step explanation:

${(49)}^{2}$

$using \: the \: identity$

$(a - b) ^{2} = {a}^{2} - 2ab + {b}^{2}$

${(49)}^{2} = {(50 - 2)}^{2}$

$= {(50)}^{2} - 2 \times 50 \times 1 + {1}^{2}$

$= 2500 - 100 + 1$

$= 2401$

FORMULA IS USED IS (a-b) ^2=a^2+2ab+b^2