a,= 𝑥(5𝑥+4)
b, =4x(x2 + 6xy - 3y2 )
c,=2(𝑥3−7𝑥)
=2𝑥(𝑥2−7)
Câu 4:
a: \(5x^2+4x=x\left(5x+4\right)\)
b: \(4x^3+24x^2y-12xy^2\)
\(=4x\left(x^2+6xy-3y^2\right)\)
c: \(2x^3-14x=2x\left(x^2-7\right)\)
d: \(6x^2y-9xy^2+15x^2y^2\)
\(=3xy\left(2x-3y+5xy\right)\)