LLS

Algebra Level 1

Which of the following is equal to 7 x 2 + 2 x − 4 x 2 − 11 x 7x^2 + 2x - 4x^2 - 11 x ?

Select one or more

3 ( x 2 − 3 x ) 3(x^2-3x) 3 x ( x − 3 ) 3x(x-3) x ( 3 x − 9 ) x(3x-9) 3 x 2 ( 1 − 3 x ) 3x^2(1-3x) 3 x 2 − 9 x 3x^2-9x

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1 solution

Bithiah Koshy
Nov 3, 2020

Easy and Quick explanation:

7 x 2 + 2 x − 4 x 2 − 11 x 7x^{2} + 2x - 4x ^{2} - 11x in simplified form is 3 x 2 − 9 x 3x^{2} - 9x .

3 ( x 2 − 3 x ) = 3 x 2 − 9 x 3(x^{2} - 3x) = 3x ^ {2} - 9x ------ Correct

3 x ( x − 3 ) = 3 x 2 − 9 x 3x(x - 3) = 3x ^ {2} - 9x ------- Correct

x ( 3 x − 9 ) = 3 x 2 − 9 x x(3x - 9) = 3x ^ {2} - 9x -------- Correct

3 x 2 ( 1 − 3 x ) = 3 x 2 − 9 x 3 3x^{2}(1 - 3x) = 3x ^ {2} - 9x^{3} ------ Incorrect

And of course 3 x 2 − 9 x = 3 x 2 − 9 x . 3x^{2} - 9x = 3x^{2} - 9x.

Hope I explanation was useful to everyone! If it is pls upvote! Thx!

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