Question

If a+b = 4 and ab = 3 then a² + b2 = ?
(a) 16
(b) 12
(c) 11
(d) 10​

Answer 1

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Answer 2

Answer:

d) 10

Step-by-step explanation:

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

(4)^2 = a^2 + b^2 + 2× 3

16 = a^2 + b^2 +6

16-6 = a^2 + b^2

=10