Question

if a+b=7 ,ab=12 then find the value of a^2 + b^2​

Answer 1

Answer:

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Step-by-step explanation:

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Identity used

= (a+b)² = a² + b² +2ab

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Answer 2

ab=12

$a + b = 7$

Squaring both sides

(a+b)²=7²

a²+b²+2ab=49

a²+b²+2(12)=49.

a²+b²+24=49

a²+b²=49-24

a²+b²=25