If x = -1, then which of the following equations makes a true statement 4x+9=20
-4x-5=-15
-3x+15=18
-5x-15=-22

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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