Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation x^4+2*x^2-8=0
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Equation 5x+12=8x+30
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Equation x^2-7x+12=0
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Equation 6*3+x=72
- Express {x} in terms of y where:
- 2*x+3*y=14
- -18*x+8*y=-2
- -9*x+5*y=-2
- 10*x-5*y=3
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Identical expressions
- sqrt(two x^ two +21x- eleven)-sqrt(2x^2- nine x+ four)=sqrt(eighteen *x-9)
- square root of (2x squared plus 21x minus 11) minus square root of (2x squared minus 9x plus 4) equally square root of (18 multiply by x minus 9)
- square root of (two x to the power of two plus 21x minus eleven) minus square root of (2x squared minus nine x plus four) equally square root of (eighteen multiply by x minus 9)
- √(2x^2+21x-11)-√(2x^2-9x+4)=√(18*x-9)
- sqrt(2x2+21x-11)-sqrt(2x2-9x+4)=sqrt(18*x-9)
- sqrt2x2+21x-11-sqrt2x2-9x+4=sqrt18*x-9
- sqrt(2x²+21x-11)-sqrt(2x²-9x+4)=sqrt(18*x-9)
- sqrt(2x to the power of 2+21x-11)-sqrt(2x to the power of 2-9x+4)=sqrt(18*x-9)
- sqrt(2x^2+21x-11)-sqrt(2x^2-9x+4)=sqrt(18x-9)
- sqrt(2x2+21x-11)-sqrt(2x2-9x+4)=sqrt(18x-9)
- sqrt2x2+21x-11-sqrt2x2-9x+4=sqrt18x-9
- sqrt2x^2+21x-11-sqrt2x^2-9x+4=sqrt18x-9
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Similar expressions
- sqrt(2x^2-21x-11)-sqrt(2x^2-9x+4)=sqrt(18*x-9)
- sqrt(2x^2+21x-11)-sqrt(2x^2-9x+4)=sqrt(18*x+9)
- sqrt(2x^2+21x-11)-sqrt(2x^2+9x+4)=sqrt(18*x-9)
- sqrt(2x^2+21x-11)+sqrt(2x^2-9x+4)=sqrt(18*x-9)
- sqrt(2x^2+21x+11)-sqrt(2x^2-9x+4)=sqrt(18*x-9)
- sqrt(2x^2+21x-11)-sqrt(2x^2-9x-4)=sqrt(18*x-9)
sqrt(2x^2+21x-11)-sqrt(2x^2-9x+4)=sqrt(18*x-9) equation
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The solution
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__________________ ________________ / 2 / 2 __________ \/ 2*x + 21*x - 11 - \/ 2*x - 9*x + 4 = \/ 18*x - 9
$$- \sqrt{\left(2 x^{2} - 9 x\right) + 4} + \sqrt{\left(2 x^{2} + 21 x\right) - 11} = \sqrt{18 x - 9}$$
Sum and product of roots
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sum
1/2 + 5
$$\frac{1}{2} + 5$$
=
11/2
$$\frac{11}{2}$$
product
5 - 2
$$\frac{5}{2}$$
=
5/2
$$\frac{5}{2}$$
5/2