Thực hiện phép tínha)(x+1)(x-2) b)-7x2(3x-4y) c)(x+4)(x-2)-(x-3)2a)(x+3)(x-3) b)3x(5x2+2x-1) c)(x-2)2+(x-1)(x+5)a)(x-2)(x-3) b)3x(2x3-3x2+5) c)(x+2)(x-3)+x(x+1)a)(x-3)(5x-4) b)3x2(2x2-5x-4) c)(x+3)(x-3)-x(23+x)a)(2x+1)(x+2) b)2x(2xy-5x2+4) ...
Đọc tiếp
Thực hiện phép tính
a)(x+1)(x-2) b)-7x2(3x-4y) c)(x+4)(x-2)-(x-3)2
a)(x+3)(x-3) b)3x(5x2+2x-1) c)(x-2)2+(x-1)(x+5)
a)(x-2)(x-3) b)3x(2x3-3x2+5) c)(x+2)(x-3)+x(x+1)
a)(x-3)(5x-4) b)3x2(2x2-5x-4) c)(x+3)(x-3)-x(23+x)
a)(2x+1)(x+2) b)2x(2xy-5x2+4) c)2x(1-x)-(2x-1)(x+1)
x2 ( 2x3 – 4x + 3)
a, \(\left(x+1\right)\left(x-2\right)=x^2-2x+x-2=x^2-x-2\)
b, \(-7x^2\left(3x-4y\right)=-21x^3+28x^2y\)
c, \(\left(x+4\right)\left(x-2\right)-\left(x-3\right)^2=x^2-2x+4x-8-\left(x^2-6x+9\right)\)
\(=x^2+2x-8-x^2+6x-9=8x-17\)
Bạn ơi bạn giúp mình hết đc k??