Câu hỏi của khangnip

Question

A(x)=3^3-5x^4+2x^2-7B=8x^3+7x^4-x^2+11C=x^3+x^4-8x^2+6 . Tính A(x)+C(x) ; A(x)-B(x)+C(x) ; A(x)+B(x)-C(x) . Các bn làm hộ mik với :3

2611 · Accepted Answer

`A(x)+C(x)``=3x^3-5x^4+2x^2-7+x^3+x^4-8x^2+6``=-4x^4+4x^3-6x^2-1`_____________________________________________________`A(x)-B(x)+C(x)``=3x^3-5x^4+2x^2-7-8x^3-7x^4+x^2-11+x^3+x^4-8x^2+6``=-11x^4-4x^3-5x^2-12`_____________________________________________________`A(x)+B(x)-C(x)``=3x^3-5x^4+2x^2-7+8x^3+7x^4-x^2+11-x^3-x^4+8x^2-6``=x^4+10x^3+9x^2-2`Câu trả lời: `A(x)+C(x)``=3x^3-5x^4+2x^2-7+x^3+x^4-8x^2+6``=-4x^4+4x^3-6x^2-1`_____________________________________________________`A(x)-B(x)+C(x)``=3x^3-5x^4+2x^2-7-8x^3-7x^4+x^2-11+x^3+x^4-8x^2+6``=-11x^4-4x^3-5x^2-12`_____________________________________________________`A(x)+B(x)-C(x)``=3x^3-5x^4+2x^2-7+8x^3+7x^4-x^2+11-x^3-x^4+8x^2-6``=x^4+10x^3+9x^2-2`

Võ Thị Mạnh · Answer

A(x)+C(x)A(x)+C(x)=3x3−5x4+2x2−7+x3+x4−8x2+6=3x3-5x4+2x2-7+x3+x4-8x2+6=−4x4+4x3−6x2−1=-4x4+4x3-6x2-1_____________________________________________________A(x)−B(x)+C(x)A(x)-B(x)+C(x)=3x3−5x4+2x2−7−8x3−7x4+x2−11+x3+x4−8x2+6=3x3-5x4+2x2-7-8x3-7x4+x2-11+x3+x4-8x2+6=−11x4−4x3−5x2−12=-11x4-4x3-5x2-12_____________________________________________________A(x)+B(x)−C(x)A(x)+B(x)-C(x)=3x3−5x4+2x2−7+8x3+7x4−x2+11−x3−x4+8x2−6=3x3-5x4+2x2-7+8x3+7x4-x2+11-x3-x4+8x2-6=x4+10x3+9x2−2Câu trả lời: A(x)+C(x)A(x)+C(x)=3x3−5x4+2x2−7+x3+x4−8x2+6=3x3-5x4+2x2-7+x3+x4-8x2+6=−4x4+4x3−6x2−1=-4x4+4x3-6x2-1_____________________________________________________A(x)−B(x)+C(x)A(x)-B(x)+C(x)=3x3−5x4+2x2−7−8x3−7x4+x2−11+x3+x4−8x2+6=3x3-5x4+2x2-7-8x3-7x4+x2-11+x3+x4-8x2+6=−11x4−4x3−5x2−12=-11x4-4x3-5x2-12_____________________________________________________A(x)+B(x)−C(x)A(x)+B(x)-C(x)=3x3−5x4+2x2−7+8x3+7x4−x2+11−x3−x4+8x2−6=3x3-5x4+2x2-7+8x3+7x4-x2+11-x3-x4+8x2-6=x4+10x3+9x2−2

Khoá học trên OLM (olm.vn)

Khoá học trên OLM (olm.vn)