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Solve the equation for x, where x is a real number: -2x^2 + 7x - 5 = 0
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Mar 25, 2019
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Solve the equation for x, where x is a real number:
-2x^2 + 7x - 5 = 0
Mathematics
college
Jon Gan
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Jon Gan
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To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
x = [ -b ± √(b^2 - 4ac) ] / (2a)
x = [ -7 ± √((7)^2 - 4(-2)(-5)) ] / ( 2(-2) )
x = [-7 ± √(49 - (40) ) ] / ( -4 )
x = [-7 ± √(9) ] / ( -4)
x = [-7 ± 3 ] / ( -4 )
x = 7/4 ± -3/4
The answers are 7/4 + 3/4 = 5/2 and 1.
Achille G
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Mar 26, 2019
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Achille G
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First you must know this.
Then, you will know that a=-2 b=7 c=-5.
Now, use the quadratic formula.
You will then get two values for x.
there you go! That's the answer.
Dre Jackson
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Mar 29, 2019
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Dre Jackson
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