If a + b = 9 and ab = 20, find the value of (a² + b²).
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2
Answer:
the answer is
41
Step-by-step explanation:
Given that
a+b = 9
on squaring both sides we get,
a^2 + b^2 +2ab = 9^2
a^2 +b^2 +2(20) = 81 [ ab = 20 (given)]
a^2 +b^2 = 81- 40
a^2+ b^2 = 41
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