Question

Ifa+b= 2 2 andab=2,thenfindi.a2 +b2

Answer 1

Step-by-step explanation:

Write the algebraic expression of the following.

a) The sum of a and b.

b) a taken away from 4b.

c) one third of the sum of x,y and z.

Answer 2

$(a+b)2=a2+b2+2ab \: \\ =>a {}^{2} +b {}^{2} =(a+b) {}^{2} −2ab \\ Given, a+b=2 and ab=2 \\So, a2+b2=(a+b)2−2ab \\ = 52−2×6=25−12=13$