If 4ab = 40 and a-b = 4 , then find the value of a²+b².
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Answer:
36
Step-by-step explanation:
a-b = 4
squaring both sides
a^2 + b^2 - 2ab = 16
a^2 + b^2 = 16 + 2ab
4ab = 40
2ab = 20
a^2 + b^2 = 16 + 20
a^2 + b^2 = 36
rustyattacker03629:
nice, your answer is correct
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