Question

Factor the polynomial 4x4 – 20x2 – 3x2 15 by grouping. What is the resulting expression?.

Answer 1

`=-669`

Explanation:

`4\cdot \:4-20\cdot \:2-3\cdot \:215`

`\mathrm{Follow\:the\:PEMDAS\:order\:of\:operations}`

`4\cdot \:4=16`

`=16-20\cdot \:2-3\cdot \:215`

`20\cdot \:2=40`

`=16-40-3\cdot \:215`

`3\cdot \:215=645`

`=16-40-645`

`16-40=-24`

`=-24-645`

`-24-645=-669`

`=-669`

Answer 2

(4x^2 – 3)(x^2 – 5)

Explanation: