jayleasantiago jayleasantiago

18-12-2020
Mathematics

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Bob says that when he multiplies (x+3) (x-3) he gets x^2-6x-9 is he correct explain

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mg051203 mg051203

18-12-2020

(x+3)(x-3)
x*x=x^2
x*-3=-3x
3*x=3x
3*-3=-9

where’s where he most likely messed up
x^2-3x+3x-9

the correct answer is x^-9

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