Question

If a+b=7 and ab=12,find the value of a*2+b*2=

Answer 1

Answer:

answer is 24

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

a+b=7,

squaring both sides,

(a+b)^2=(7)^2

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

a^2+2(12)+b^2=49

a^2+24+b^2=49

a^2+b^2=49-24

a^2+b^2=25