3 years ago

X^2-4x-5=0 Use quadratic formula to solve

Mathematics

2 answers:

iVinArrow [24]3 years ago

8 0

the answer is x1= -1 , x2= 5

scZoUnD [109]3 years ago

8 0

Answer:

x = 5, x = -1

Step-by-step explanation:

Quadratic formula: if ax² + bx + c = 0, x = (-b ± √(b² - 4ac))/2a

Plug in: x² - 4x - 5 = 0, x = (4 ± √(16 + 20))/2

Simplify: x = (4 ± 6)/2

Divide: x = 5, x = -1

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