If a-b=7and ab=9then a square b square=
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a - b = 7
Squaring on both sides
(a - b)^2 = 7^2
a^2 + b^2 - 2ab = 49
a^2 + b^2 - 2×9 = 49
a^2 + b^2 - 18 = 49
a^2 + b^2 = 49 + 18
a^2 + b^2 = 67
Squaring on both sides
(a - b)^2 = 7^2
a^2 + b^2 - 2ab = 49
a^2 + b^2 - 2×9 = 49
a^2 + b^2 - 18 = 49
a^2 + b^2 = 49 + 18
a^2 + b^2 = 67
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