Toán Rút gọn A= (x^2-2x/2x^2+8 – 2x^2/8-4x+2x^2-x^3)(1-2/x^2-1/x) 31/07/2021 By Nevaeh Rút gọn A= (x^2-2x/2x^2+8 – 2x^2/8-4x+2x^2-x^3)(1-2/x^2-1/x)
Đáp án: Giải thích các bước giải: A= (x^2-2x/2x^2+8 – 2x^2/8-4x+2x^2-x^3)(1-2/x^2-1/x) ĐKXĐ :x≠0;x≠2 A=(x2−2x2x2+8x−2×28−4x+2×2−x3)(1−1x−2×2)A=(x2−2x2x2+8x−2×28−4x+2×2−x3)(1−1x−2×2) =((x2−2x)(x−2)+2.2×22(x−2)(x2+4))(x2−x−2×2)=((x2−2x)(x−2)+2.2×22(x−2)(x2+4))(x2−x−2×2) =x2(x−2)×(x+1)(x−2)x2=x2(x−2)×(x+1)(x−2)x2 =x+12x Trả lời
A= (x^2-2x/2x^2+8 – 2x^2/8-4x+2x^2-x^3)(1-2/x^2-1/x) ĐKXĐ : {x≠0x≠2{x≠0x≠2 A=(x2−2x2x2+8x−2x28−4x+2x2−x3)(1−1x−2x2)A=(x2−2x2x2+8x−2×28−4x+2×2−x3)(1−1x−2×2) =((x2−2x)(x−2)+2.2x22(x−2)(x2+4))(x2−x−2x2)=((x2−2x)(x−2)+2.2×22(x−2)(x2+4))(x2−x−2×2) =x2(x−2)×(x+1)(x−2)x2=x2(x−2)×(x+1)(x−2)x2 =x+12x Trả lời
Đáp án:
Giải thích các bước giải:
A= (x^2-2x/2x^2+8 – 2x^2/8-4x+2x^2-x^3)(1-2/x^2-1/x)
ĐKXĐ :x≠0;x≠2
A=(x2−2x2x2+8x−2×28−4x+2×2−x3)(1−1x−2×2)A=(x2−2x2x2+8x−2×28−4x+2×2−x3)(1−1x−2×2)
=((x2−2x)(x−2)+2.2×22(x−2)(x2+4))(x2−x−2×2)=((x2−2x)(x−2)+2.2×22(x−2)(x2+4))(x2−x−2×2)
=x2(x−2)×(x+1)(x−2)x2=x2(x−2)×(x+1)(x−2)x2
=x+12x
A= (x^2-2x/2x^2+8 – 2x^2/8-4x+2x^2-x^3)(1-2/x^2-1/x)
ĐKXĐ : {x≠0x≠2{x≠0x≠2
A=(x2−2x2x2+8x−2x28−4x+2x2−x3)(1−1x−2x2)A=(x2−2x2x2+8x−2×28−4x+2×2−x3)(1−1x−2×2)
=((x2−2x)(x−2)+2.2x22(x−2)(x2+4))(x2−x−2x2)=((x2−2x)(x−2)+2.2×22(x−2)(x2+4))(x2−x−2×2)
=x2(x−2)×(x+1)(x−2)x2=x2(x−2)×(x+1)(x−2)x2
=x+12x