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How do you simplify #(2xˆ2-8x+1)+(9xˆ2+4x-1)#?

Answer 1

Genesis Allen

#=11x^2 -4x#

#(2x^2−8x+1)+(9x^2+4x−1)#

Grouping like terms

#=color(blue)((2x^2 +9x^2)) + color(green)((-8x +4x)) + (1-1)# #=color(blue)((11x^2)) - color(green)((4x)) + 0#

#=11x^2 -4x#

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Answer 2

Avery Alexander

To simplify (2x^2 - 8x + 1) + (9x^2 + 4x - 1), combine like terms:

(2x^2 + 9x^2) + (-8x + 4x) + (1 - 1)

= 11x^2 - 4x + 0

So, the simplified expression is 11x^2 - 4x.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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