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vredina [299]
3 years ago
7

Which of the following are solutions to the equation below? Check all that apply . x ^ 2 + x - 20 = 0

Mathematics
1 answer:
Rina8888 [55]3 years ago
7 0

Answer:

x= -5     or    x  =  4

Solution Set = {-5, 4}

Step-by-step explanation:

x^{2} + x -20 = 0

x^{2} + 5x - 4x -20  = 0

(x^{2} + 5x) - (4x + 20)  = 0

x(x + 5) - 4(x + 5)  =  0

(x + 5)(x - 4)  = 0

x+ 5= 0     or    x - 4 = 0

x= -5     or    x  =  4

Solution Set = {-5, 4}

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