−5 thus, x − 5 = −2 or x − 5 = −5, so x = 3, 0.
0 = x 2 − 4 x − 12 0 = (x – 6)(x + 2) thus, x = 6, –2. 59.
5 thus, x = 0, − . 9 60.
x = 14 − 5 x x 2 + 5 x − 14 = 0 (x – 2)(x + 7) = 0 thus, x = 2, –7.
r 2 − 3r − 10 = 0 (r – 5)(r + 2) = 0 thus, r = 5, –2. 63.
0 = x 2 − 8 x + 12 0 = (x – 6)(x – 2) x = 