Trang chủ » Hỏi đáp » Môn Toán x ( x + 3 ) – 3x (x + 3 ) ^2 – x^2 6x^2 + 15x 9x^2 – 1 04/02/2025 x ( x + 3 ) – 3x (x + 3 ) ^2 – x^2 6x^2 + 15x 9x^2 – 1
x(x + 3) – 3x = x(x + 3 – 3) = x.x = x^2 ————– (x + 3)^2 – x^2 = (x + 3 – x)(x + 3 + x) = 3(2x + 3) ————— 6x^2 + 15x = 3x(2x + 5) —————- 9x^2 – 1 = (3x)^2 – 1^2 = (3x – 1)(3x + 1) Trả lời
x(x+3)-3x =x(x+3-3) =x.x =x^2 $\\$ (x+3)^2-x^2 =(x+3-x)(x+3+x) =3(2x+3) $\\$ 6x^2-15x =3x(2x+5) $\\$ 9x^2-1 =(3x)^2-1^2 =(3x-1)(3x+1) Trả lời
2 bình luận về “x ( x + 3 ) – 3x (x + 3 ) ^2 – x^2 6x^2 + 15x 9x^2 – 1”