Which of the following polynomials is the correct simplified form of -21x2+22x2-13x2-10x+5x-102? a.-12x2-5x-102 b.-12x2+5x-102 c.12x2+5x-102 d.12x2-5x-102

A.-12x^2-5x-102

Step-by-step explanation:

We are given a polynomial of degree 2 where terms are not grouped and simplified.

We have

-21x^2+22x^2-13x^2-10x+5x-102

To get this in proper form we have to group the like terms first

x^2 term = -21x^2+22x^2-13x^2 = x^2 (-21+22-13)

= x^2(-34+22) = -12x^2

x terms are -10x+5x = x(-10+5) = -5x

Constant term is only one = -102

Hence the polynomial in simplified form is

-12x^2-5x-102

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2