Question

Simplify the algebraic expression: 7x2 + 6x – 9x – 6x2 + 15.



A. x2 – 3x + 15
B. x4 – 3x + 15
C. x2 + 15x + 15
D. 13x2 + 3x + 15

Answer 1

Answer:

The correct answer option is A. x2 – 3x + 15.

Step-by-step explanation:

We are given the following expression and we are supposed to simplify it:

$7x^2+6x-9x-6x^2+15$

Before solving it, a good idea will be to arrange all the like terms together in their decreasing power and write the expression as:

$7x^2-6x^2+6x-9x+15$

Simplifying it to get:

$x^2-3x+15$

Therefore, the first option A is the correct answer x2 – 3x + 15.

Answer 2

Answer:

A. $x^{2} - 3x +15$

Step-by-step explanation:

Given:

7x^2 + 6x – 9x – 6x^2 + 15.

On combining the x^2, and "x" terms we get,

= (7x^2 – 6x^2) + (6x – 9x)  + 15

Now, here simple addition of integers takes places

=  x^ - 3x + 15