rainyshea72
16.08.2020 •
Mathematics
If 2x^2+2x=12, what is x?
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Ответ:
x= 2
x= -3
Step-by-step explanation:
Solving as normal quadratic equation:
2x^2+2x=12x^2 +x = 6x^2 + x - 6= 0x = (-1 ± √(1+4*1*6)/2 x = ( - 1 ± √25)/2 x = (-1 ± 5)/2x= 2x= -3Roots are 2 and -3
Ответ:
Step-by-step explanation:
2x² + 2x - 12 = 0
Divide all the terms by 2 to simplify the terms
That's
x² + x - 6 = 0
Write x as a difference
That's
x² + 3x - 2x - 6 = 0
Factor x out of the equation
That's
x( x + 3) - 2x - 6 = 0
Factor out - 2 from the expression
x(x + 3) - 2( x + 3) = 0
Factor out x + 3 from the expression
That's
( x + 3)(x - 2) = 0
x + 3 = 0 x - 2 = 0x = - 3 x = 2Hope this helps you
Ответ:
16.6
Step-by-step explanation: