Question

Giải giúp em bài 1

Answer 1

a) \(x^2-7x+12=x\left(x-4\right)-3\left(x-4\right)=\left(x-4\right)\left(x-3\right)\)

b) \(x^2-9x+20=x\left(x-5\right)-4\left(x-5\right)=\left(x-5\right)\left(x-4\right)\)

c) \(x^2-6x-7=x\left(x-7\right)+1\left(x-7\right)=\left(x-7\right)\left(x+1\right)\)

d) \(x^2-x-12=x\left(x-4\right)+3\left(x-4\right)=\left(x-4\right)\left(x+2\right)\)