Bila akar-akar persamaan kuadrat y kuadrat - 2y + a = 0 ternyata 3 lebih besar daripada akar-akar persamaan x kuadrat - bx - 32 = 0, maka a + b = .. .. mohon dengan caranya
Galladeaviero
P = x1 - 3 x1 = p+3 sub ke y² - 2y + a = 0 (p+3)² - 2(p+3) + a = 0 p² + 6p + 9 - 2p - 6 + a = 0 p² + 4p +(3+a) = x² - bx - 32 4 = -b --> b = -4 3+a = -32 --> a = - 35 a+b = 8- 35 = - 27
x1 = p+3 sub ke y² - 2y + a = 0
(p+3)² - 2(p+3) + a = 0
p² + 6p + 9 - 2p - 6 + a = 0
p² + 4p +(3+a) = x² - bx - 32
4 = -b --> b = -4
3+a = -32 --> a = - 35
a+b = 8- 35 = - 27