After being rearranged and simplified, which of the following equations could be solved using the quadratic formula?

1 answer:

3 0

A. 2x^2 - 3x + 10 = 2x + 21
2x^2 - 3x - 2x + 10 - 21 = 0
2x^2 - 5x - 11 = 0 (quadratic equation)

2x^2 - 6x - 7 = 2x^2
2x^2 - 2x^2 - 6x - 7 = 0
-6x - 7 = 0 (not a quadratic equation)

5x^2 + 2x - 4 = 2x^2
5x^2 - 2x^2 + 2x - 4 = 0
3x^2 + 2x - 4 (quadratic equation)

5x^3 - 3x + 10 = 2x^2
5x^3 - 2x^2 - 3x + 10 = 0 (not a quadratic equation)

Therefore, options a and c can be solved using the quadratic formula.

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Change the subject of this equation to L P=2(L+B)

dusya [7]

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Divide each side by 2 : P/2 = L + B

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Which addition does the model below represent? A. 3+(-1) B. 3+4 C. 3+ (-4) D. 3+1

Gemiola [76]

Answer:

C. 3+ (-4)

Step-by-step explanation:

First we have three but then we go back 4 spaces which results in -1