Question

9 WHAT is the value of a2 + b2 when a-b =7
and ab=18
a)75
b 95
c)85
d)80
PLS ANSWER FAST​

Answer 1

Answer:

85

Step-by-step explanation:

a-b=7

square both side

a^2+b^2-2ab=49

a^2+b^2 -2(18)= 49

a^2+b^2= 49+36

= 85

Answer 2

Answer:

In simple way,

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

=(7)^ +2×18

= 49 + 36

= 85.

ans. c.