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1 year ago

Factor x3 – 7x2 – 5x + 35 by grouping. What is the resulting expression?

Mathematics

2 answers:

quester [9]1 year ago

8 0

X^3-7x^2-5x+35

= x^2(x-7) - 5 (x-7) now by definition

=(x^2-5)(x-7)

hope this helps

nadezda [96]1 year ago

8 0

Answer: Our final factorized form will be

$(x-\sqrt5)(x+\sqrt5)(x-7)$

Step-by-step explanation:

Since we have given that

$x^3-7x^2-5x+35$

We need to factorize the expression by grouping :

$x^3-7x^2-5x+35\\\\=x^2(x-7)-5(x-7)\\\\=(x^2-5)(x-7)$

Since we know that

$a^2-b^2=(a+b)(a-b)$

so,

$x^2-5=(x-\sqrt5)(x+\sqrt5)$

So, our final factorized form will be

$(x-\sqrt5)(x+\sqrt5)(x-7)$

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