ShakirShaikh
ShakirShaikh
19-03-2021
Mathematics
contestada
show that (3x+7)² -84x = (3x-7)
Respuesta :
crimsonorchid
crimsonorchid
19-03-2021
First expand...
(3x+7)^2 = 9x^2+42x+49
Bring down -84x...
9x^2+42x+49-84x
Solve...
9x^2-42x+49
Factor...
(3x-7) (3x-7) = (3x-7)^2
Answer Link
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