If a+b=13 and ab=40, find a²+b²
Answers
Answered by
2
(a+b)^2=(13)^2
a^2+b^2+2ab = 169
a^2+b^2=169-2*40
So answer is 89
a^2+b^2+2ab = 169
a^2+b^2=169-2*40
So answer is 89
Answered by
1
Answer:
89
Step-by-step explanation:
a²+b²=(a+b)²-2ab=13²-2x40=89
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