Question

if a + b= 14 and ab=20, find the value of a²+b²​

Answer 1

Answer:

156

Step-by-step explanation:

Here we will apply formula of (a+b) ²

(a+b) ² = a²+2ab+b²

14²= a²+b²+2(20)

Because here give (a+b) =14 & ab=20

196= a²+b²+40

a²+b²= 196-40

= 156