factorise -6xsquare -15x - 9
Answers
Answer:
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Answer:
(2x+3)(2x-3)
Step-by-step explanation:Since you asked this question, I am going to assume you are not familiar with middle term factorisation.
I will explain the process as we continue.
Factorise (-15x-9)
Multiply the coefficent of the variable on the leftmost side and the number on the rightmost side.i.e. 6*9=54.Dont consider positive or negative.
Next,Breakdown 54 into factors, and arrange them in such a way so that they form 15.i.e 54=2*3*3*3.
9+6=15
Rearranging them, we can write the equation as -
-(9+6)x-9
-6-9x-6x-9
Taking -3x common from first two values and -3 common from last two values we get= -3x(2x+3)-3(2x+3).
Therefore multiplying them,we get (2x+3)(-3x-3) which is the answer.
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