Solve for x. write both solutions, separated by a comma 2x^2-7x-4=0

Mathematics

2 answers:

avanturin [10]3 years ago

5 0

2x^2-7x-4=0

2x^2-8x+x-4=0

2x(x-4)+1(x-4)=0

(2x+1)(x-4)=0

x=-1/2, 4

lesya [120]3 years ago

3 0

Hi again

2x² - 7x - 4 = 0
Again, all you have to do is factor left side
(2x + 1)(x - 4) = 0
Set factors equal to 0
2x + 1 = 0 or x - 4 = 0
2x = 0 - 1 or x = 0 + 4
2x = - 1 0r x = 4
x = -1/2 or x = 4

Answer : (-1/2, 4)

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Answer:

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3 years ago

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in a class of 20 students, 40% are boys. 25% of the boys and 50% of the girls wear glasses. How man students wear glasses?

statuscvo [17]

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3 years ago

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marysya [2.9K]

<h2>Hello!</h2>

The answer is:

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