1. x^2 - 16 is an example of a difference of two _______?
2. Solve by factoring: One of the solutions to the quadratic equation x^2 + 3x - 28 is x = -7. What is the other solution? (Type only the numerical value of the other solution. Do not use any variables or skip any spaces.) For the other solution, x = ?
2007-08-01 08:10:12 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1) squares.
x^2 is the square of x and 16 is the square of 4.
2) 4.
x^2 + 3x - 28 = (x + 7)(x - 4), giving solutions of -7 and 4.
2007-08-01 08:12:35 · answer #1 · answered by DavidK93 7 · 1⤊ 0⤋
1. squares
2. (x+7)(x-4)
then x = -7 or 4
2007-08-01 15:13:44 · answer #2 · answered by gfulton57 4 · 0⤊ 0⤋
perfect squares
(x+7)(x-4), so the other soln is x=4.
2007-08-01 15:13:26 · answer #3 · answered by John V 6 · 0⤊ 0⤋
1. terms
2. i don't know
2007-08-01 15:14:24 · answer #4 · answered by southernsweetie 3 · 0⤊ 1⤋