if a-b=7 and ab=8 evaluate a² +b²
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a. = 7+b -------(1)
a= 8/b--------(2)
7+b = 8/b
b = 8/b - 7
b² = 8-7
b = √1
b = 1
substitution
a = 7+1
a = 8....
hope it help you mate
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