Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation exp(x)=0
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Equation 2*x^2+5*x-25=13*x+17
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Equation 3*x-15=0
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Equation 0=2-3x
- Express {x} in terms of y where:
- 9*x-19*y=-20
- 15*x+17*y=-10
- -11*x-18*y=6
- -7*x-5*y=-17
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Identical expressions
- x^ two + thirteen *x+ forty-two =(x+ six)*(x-a)
- x squared plus 13 multiply by x plus 42 equally (x plus 6) multiply by (x minus a)
- x to the power of two plus thirteen multiply by x plus forty minus two equally (x plus six) multiply by (x minus a)
- x2+13*x+42=(x+6)*(x-a)
- x2+13*x+42=x+6*x-a
- x²+13*x+42=(x+6)*(x-a)
- x to the power of 2+13*x+42=(x+6)*(x-a)
- x^2+13x+42=(x+6)(x-a)
- x2+13x+42=(x+6)(x-a)
- x2+13x+42=x+6x-a
- x^2+13x+42=x+6x-a
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Similar expressions
- x^2-13*x+42=(x+6)*(x-a)
- x^2+13*x+42=(x-6)*(x-a)
- x^2+13*x-42=(x+6)*(x-a)
- x^2+13*x+42=(x+6)*(x+a)
x^2+13*x+42=(x+6)*(x-a) equation
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The solution
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2 x + 13*x + 42 = (x + 6)*(x - a)
$$\left(x^{2} + 13 x\right) + 42 = \left(- a + x\right) \left(x + 6\right)$$
Detail solution
Given the equation:
Expand expressions:
Reducing, you get:
Move free summands (without x)
from left part to right part, we given:
$$a x + 6 a + 7 x = -42$$
Move the summands with the other variables
from left part to right part, we given:
$$a x + 7 x = \left(-6\right) a - 42$$
Divide both parts of the equation by (7*x + a*x)/x
We get the answer: x = -6
x^2+13*x+42 = (x+6)*(x-a)
Expand expressions:
x^2+13*x+42 = x^2 - 6*a + 6*x - a*x
Reducing, you get:
42 + 6*a + 7*x + a*x = 0
Move free summands (without x)
from left part to right part, we given:
$$a x + 6 a + 7 x = -42$$
Move the summands with the other variables
from left part to right part, we given:
$$a x + 7 x = \left(-6\right) a - 42$$
Divide both parts of the equation by (7*x + a*x)/x
x = -42 - 6*a / ((7*x + a*x)/x)
We get the answer: x = -6
The graph