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Quadratic equation
Solve the following equation by using quadratic
formula.
(1) 6𝑥2-5x-4 = 0
Solution:
a = 6 , b = -5 , c = -4
by quadratic formula:
𝑥 = −𝑏±√𝑏2−4𝑎𝑐
2𝑎
𝑥 = −(−5)±√(−5)2−4(6)(−4)
2(6)
𝑥 = 5±√25+96
12
𝑥 = 5±√121
12
either
𝑥 = 5+11
12 𝑥 = 5−11
12
𝑥 = 16
12 𝑥 = −6
12
