Question

Simplify (–x2 +5) – (3 – 4x2)

Answer 1

when you subtract you have to change the signs so it would be -3+4x2
then you combine like terms to get 3x2+2 i am assuming the 2"s mean squared

Answer 2

`(-x^(2) +5)-(3-4 x^(2) )`
To simplify this, use the FOIL method. First, Outer, Inner, Last.
First: Multiply the first numbers in each set of parentheses.

`-x^(2) *-3=3 x^(2)`
Outer: Multiply the two outermost numbers in the equation.

`-x^(2) *-4 x^(2) =5 x^(4)`
Inner: Multiply the two innermost numbers in the equation.

`5*-3=-15`
Last: Multiply the last numbers in each set of parentheses.

`5*-4 x^(2) =-20 x^(2)`
Then, we put them all together in an equation, from the highest exponent to the lowest, then highest prefix (number before the variable) to lowest.

`5 x^(4) -20 x^(2) +3 x^(2) -15`
And simplify.

`5 x^(4) -17 x^(2) -15`