Question

Find the value of
$(49) {}^{2}$
​

Answer 1

By using,

$\boxed{\sf{(a-b)²=a²+b²-2ab}}$

We know that,

$\sf{(49)^{2}= (50-1)^{2}}$

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

$\sf{\:\:\:\:\:\:\:\:\:\:\:=\: 2500 + 1 - 100}$

$\sf{\:\:\:\:\:\:\:\:\:\:\:= \:2400 + 1=}$$\boxed{\textsf{\textbf{\red{2401}}}}$

Answer 2

$\huge\fbox\pink{˙❥answer}$

refer attachment