Question

Subtract and simplify:(3x^2 + 2x - 5) - (4x^2 + 5 - 1)
A. x^2 - 3x + 4
B. -x^2 + 7x - 6
C. 7x^2 + 7x - 6
D. -x^2 - 3x - 4
My answer: D so can someone show me how I got it because my teacher wouldn't show me how to get the answer.

Answer 1

well, this is the easiest of all Maths @Takirap2000. aLL YOU NEED TO DO IS TO SUBTRACT TERMS WITH THE SAME POWERS. For example, 3x^2 4x^2 gave you -x^2, I think you can do the rest. But if D is your answer, I am soo sure that you wanted to write 5x in your second equation. Check it.

Answer 2

but my teacher didn't show me how to get this she just give me the answer and I don't know how to do this.

Answer 3

yes, I am saying subtract terms that have the same powers, 3x^2 - 4x^2 because their power is 2, and 2x-5x because their power is 1 or x is to the power 1, and then the constants 5 -(-1)

Answer 4

I don't understand I need to see it in equation or draw. the word I don't understand sorry:(

Answer 5

In second expression 5 should be replaced by. 5x. Then solve it you will get the correct answer.

Answer 6

what is 3x^2 -4x^2?

Answer 7

On subtracting
(3x^2-4x^2)+(2x-5x)+{-5-(-1)}
=-x^2-3x-4

Answer 8

In second expression 5 should be replaced by. 5x. Then solve it you will get the correct answer.

Answer 9

sorry my computer had to reset and shut me down