Question

Explain The given Basic formula

${(a + b)}^{2} = {a}^{2} + 2 {ab}+ {b}^{2}$
And by the same formula explain and solve
${(105)}^{2}$

plz answer it fast coz it's too urgent...
Tomorrow is my Math's Exam...​

Answer 1

Answer:

hey buddy!!! here's your answer

Step-by-step explanation:

(a+b)^2=a^2 +2ab +b^2

=> (a+b) (a+b) = a^2 + ab +Ab + b^2

hence obtaining the same

for (105)^2

(100+5)^2

= 100^2 +5^2 +2*100*5

=10000+25+1000

=11025

hope it was helpretty :)