Question

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If a + b = 7 and ab = 6, then a + b2 is equal to
(a) 27
(b) 13​

Answer 1

Step-by-step explanation:

a+b=7

a=6/b

6/b+b=7

b^2-7b+6=0

b^2-6b-b+6=0

b(b-6)-1(b-6)=0

(b-1)(b-6)=0

b=6,1

a+6=7

a=1

1+6*2

=13

option b is correct

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