if a + b equal to 9 AB equal to 4 find the value of a ^ 2 + b ^ 2
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Answer:
A+B=9
AB= 4
(A+B)²=A²+B²+2AB
9²=A²+B²+2(4)
81=A²+B²+8
73=A²+B²
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140/9 answer hhhhhhhh
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