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Diano4ka-milaya [45]
4 years ago
10

How to solve the equation 4x²-12x=7 algebraically

Mathematics
2 answers:
Afina-wow [57]4 years ago
4 0
Your in High School, you should know quadratic formula; start by subtracting 7 from both sides making it 4x^2 - 12x -7, now solve it using the quadratic formula. 

Answer: X= 7/2
              X= -1/2
Ksenya-84 [330]4 years ago
3 0
4x2 - 12x = 7 4x2 - 12x - 7 = 0 4x2 + 2x - 14x - 7 = 0 Take 2x common from first 2 terms and -7 from last 2 terms 2x(2x + 1) - 7(2x + 1) = 0 Now take 2x+1 whole common from full equation (2x + 1)(2x - 7) = 0 Now put both equal to 0 separately 2x + 1 = 0 2x = -1 x = -1/2 And 2x - 7 = 0 2x = 7 x = 7/2 So (-1/2 , 7/2) will be the answer .
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