Question

b) Subtract: 8x^4+ - 7x^3 + 5x^2 - 6x from - 10x^4 + 5x^3 + 2x^2 - 4x
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Answer 1

Step-by-step explanation:

(-10x^4+5x^3+2x^2-4x)-(8x^4-7x^3+5x^2-6x)

-10x^4+5x^3+2x^2-4x-8x^4+7x^3-5x^2+6x

=-10x^4-8x^4+5x^3+7x^3+2x^2-5x^2-4x+6x

=-18x^4+12x^3-3x^2+2x

Answer 2

Answer:

-18x^4+12x^3-2x^2+2x

Step-by-step explanation:

Write the equation like this:

-10x^4+5x^3+3x^2-4x-(8x^4+7x^3-5x^2+6x)

Convert the signs:

-10x^4+5x^3+3x^2-4x-8x^4-7x^3+5x^2+6x

Then take the like terms together:

=(-10x^4-8x^4)+(5x^3-7x^3)+(3x^2+5x^2)-(4x+6x)

=-18x^4-2x^3+8x^2+2x