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Factor completely: X2-7x-30


Sagot :

[tex]x^2-7x-30=\\ x^2-10x+3x-30=\\ x(x-10)+3(x-10)=\\ (x+3)(x-10)[/tex]
x²-7x-30

=(x-10)(x+3)

Therefore, x=10 and x=-3.