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3 years ago

Solve for x using desmos or the quadratic formula 2x^2 - 5x - 12 = 0

Mathematics

2 answers:

den301095 [7]3 years ago

6 0

Answer:

x = 4 or x = (-3)/2

Step-by-step explanation:

ivanzaharov [21]3 years ago

5 0

Answer:

x = 4 or x = (-3)/2

Step-by-step explanation:

Solve for x over the real numbers:

2 x^2 - 5 x - 12 = 0

x = (5 ± sqrt((-5)^2 - 4×2 (-12)))/(2×2) = (5 ± sqrt(25 + 96))/4 = (5 ± sqrt(121))/4:

x = (5 + sqrt(121))/4 or x = (5 - sqrt(121))/4

sqrt(121) = sqrt(11^2) = 11:

x = (5 + 11)/4 or x = (5 - 11)/4

(5 + 11)/4 = 16/4 = 4:

x = 4 or x = (5 - 11)/4

(5 - 11)/4 = -6/4 = -3/2:

Answer: x = 4 or x = (-3)/2

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