... square root of 13 9.24 is exactly(A) 1. 18 (B) 11 .8 (C) 11 8 (D) .11 8 (E) 11 80 7. Find xx2236 25+.(A) 11 30x(B)930x(C)x 11 (D)2 11 x(E)x 61 30 8. xy22+ is equal to(A) x + y(B) x ... subtract.6x + 9y = 21 6x – 4y = 8 13 y = 13 y = 1 6. (A) Multiply first equation by 3, second by 2,then add.9x + 6y = 15 a + 3b8x – 6y = 2a + 14 b 17 x = 17 a + 17 bx = a + bChapter 8 12 8 www.petersons.comSOLUTIONS ... + 1) = 0x = 0 4x + 1 = 0x = 0 or – 1 4 8. (A) (x + 12 )(x – 3) = 0x + 12 = 0 x – 3 = 0x = 12 or +39. (B)x23+= x + 1 x2 + 3 = x2 + 2x + 1 3= 2x + 1 2= 2xx = 1 Checking, 4 = 1 + 1, ...