Question 927232: factor trinomial below:
-7x^2 + 5x + 12 = 0
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! -7xx + 5x + 12 = 0
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the above quadratic equation is in standard form, with a=-7, b=5 and c=12
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to solve the quadratic equation, by using the quadratic formula, copy and paste this:
-7 5 12
into this solver: https://sooeet.com/math/quadratic-equation-solver.php
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the quadratic has two real roots at:
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x = -1
x = 1.71428571
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factorization:
-7xx + 5x + 12 = 0
xx - (5/7)x - 12/7 = 0
(x + 7/7)(x - 12/7)
(x + 1)(x - 1.71428571)
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answer:
the longest dimension of the rectangle = 12 cm
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