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Factor 5x²-2x+5x-2 by grouping.

A) (x-1)(5x+2)
B) (x-2)(5x+1)
C) (x+1)(5x-2)
D) (x+2)(5x-1)


Sagot :

Answer:

C) (x+1)(5x-2)

Step-by-step explanation:

Solving the Problem

We can rearrange the terms in the polynomial to maximize our factoring.

Since [tex]5x^2[/tex] and [tex]5x[/tex] both have "5" and an x in their term and [tex]-2x[/tex] and [tex]-2[/tex] both have "-2" in their term we can swap -2x and +5x so that they're next to their respective terms.

                                      [tex]5x^2+5x-2x-2[/tex]

[tex]\dotfill[/tex]

Factoring the Problem

Between the two leftmost terms, we can factor out a 5 and an x, this leaves

                                      [tex]5x(x+1)-2x-2[/tex].

Factoring out -2 from the rightmost terms we have,

                                       [tex]5x(x+1)-2(x+1)[/tex].

Since both the left and right sides have (x+1), we can factor it from this new expression.

                                         [tex](x+1)\leftbig(5x-2)[/tex]

So, C is our final answer.

The factoring of the expression is C) (x+1)(5x-2).

To factor the expression 5x² - 2x + 5x - 2 by grouping, follow these steps:

Group the terms to find common factors:

(5x² - 2x) + (5x - 2)

Factor out the greatest common factor (GCF) from each group:

x(5x - 2) + 1(5x - 2)

Factor out the common binomial factor:

(5x - 2)(x + 1)