achiasaro28
achiasaro28
22-10-2017
Mathematics
contestada
solve 32=(x-7)(x+7)
Respuesta :
generalbiscuit
generalbiscuit
22-10-2017
32=(x+7)(x-7)
32=x^2-7x+7x-49
Add 49 both sides
81=x^2-7x+7x
Combine like terms
81=x^2
Then take to square of 81
X=9
Hope this helps good luck
Answer Link
chi3fcomm5nd
chi3fcomm5nd
22-10-2017
expanding
[tex](x-7)(x+7)=x^2-49 \\ 32= x^{2} -49 \\ x^2=81 \\ x=9 \\ Or \\ x=-9[/tex]
Answer Link
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