if a minus b is equal to 7 and a b is equal to 9 then the value of a square + b square is equal to
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8
a-b=7
ab=9
then a^2+b^2
= (a-b)^2+2ab=7^2+2×9=49+2×9=67
so the ans is 67
hope you understood
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ab=9
then a^2+b^2
= (a-b)^2+2ab=7^2+2×9=49+2×9=67
so the ans is 67
hope you understood
plz mark me as brainliest
priyanshu328:
but the correct ans is 67
sry 2 multiplt nhi kiya tha
multiply
i edited my ans
the correct ans is 67
Answered by
9
heya...!!!
given that:-
a - b = 7------(1)
ab = 9
from--(1)
(a - b) = 7
[ on SQUARING both side]
a ² + b² - 2ab = 49
=> a ² + b² = 49 + 2×9
=> a ² + b² = 67
given that:-
a - b = 7------(1)
ab = 9
from--(1)
(a - b) = 7
[ on SQUARING both side]
a ² + b² - 2ab = 49
=> a ² + b² = 49 + 2×9
=> a ² + b² = 67
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