Simplify the following expression: (5x2 + 3x + 4) − (2x2 + 5x − 1). If the final answer is written in the form Ax2 + Bx + C, what is the value of A?

Question

anonymous · Answer

Combine like terms. Keep in mind that the - in the middle will convert positives into negatives and negatives into positives

uri · Answer

(5x2 + 3x + 4) − (2x2 + 5x − 1)

Open the parentheses
5x^2+3x+4-2x^2-5x+1

anonymous · Answer

you should get$$3x ^{2}-2x+5$$

anonymous · Answer

well said @SebHuebl but yes combine all like terms

uri · Answer

Now combine all x^2 values together and all x values together and all numericals together and sign will NOT change @SebHuebl

anonymous · Answer

Then you can either use the quadratic formula or complete the square

anonymous · Answer

@uri if you leave it in parenthesis it will.

uri · Answer

Oh wait wait..@SebHuebl Got ya! sorry

uri · Answer

Well we have this right now,
5x^2+3x+4-2x^2-5x+1

Now combine all x^2 values together and all x values together and all numericals @Marcus980

anonymous · Answer

To find the value of A, use either the quadratic formula or complete the square.
Quadratic formula is$$-b \pm \sqrt{b-4ac}\div2a$$

anonymous · Answer

sorry, the b in the square root is squared. so it would be $$-b \pm \sqrt{b^2-4ac}\div2a$$

uri · Answer

@SebHuebl Let him/her first solve and bring it to an equation.