Question

 

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Bài 2:

\[ T = -10x^4 + 3x^3 - 2x^2 + 1 \]

\[ H = 6x^4 + 5x^3 - 2x^2 - 8 \]

Rút gọn:

\[ T + H = ? \]

\[ T - H = ? \]

Answer 1

T+H

\(=-10x^4+3x^3-2x^2+1+6x^4+5x^3-2x^2-8\)

\(=\left(-10x^4+6x^4\right)+\left(3x^3+5x^3\right)+\left(-2x^2-2x^2\right)+\left(1-8\right)\)

\(=-4x^4+8x^3-4x^2-7\)

T-H

\(=-10x^4+3x^3-2x^2+1-6x^4-5x^3+2x^2+8\)

\(=\left(-10x^4-6x^4\right)+\left(3x^3-5x^3\right)+\left(-2x^2+2x^2\right)+\left(1+8\right)\)

\(=-16x^4-2x^3+9\)

Answer 2

T + H = -4x⁴ + 8x³ - 4x² - 7

T - H = -16x⁴ - 2x³ + 9