# Expression of a variable from the formula + quadratic equation - math problems

#### Number of problems found: 128

• Completing square Solve the quadratic equation: m2=4m+20 using completing the square method
• Solve equation solve equation: ?
• Substitution method Solve goniometric equation: sin4 θ - 1/cos2 θ=cos2 θ - 2
• Equation 23 Find value of unknown x in equation: x+3/x+1=5 (problem finding x)
• Hyperbola equation Find the hyperbola equation with the center of S [0; 0], passing through the points: A [5; 3] B [8; -10]
• Equation of circle 2 Find the equation of a circle which touches the axis of y at a distance 4 from the origin and cuts off an intercept of length 6 on the axis x.
• Expression with powers If x-1/x=5, find the value of x4+1/x4
• Expressions 3 If k(x+6)= 4x2 + 20, what is k(10)=?
• Reciprocal value How do I calculate a number x that is 9 greater than its reciprocal (1/x)?
• 1 page 1 page is torn from the book. The sum of the page numbers of all the remaining pages is 15,000. What numbers did the pages have on the page that was torn from the book?
• Non linear eqs Solve the system of non-linear equations: 3x2-3x-y=-2 -6x2-x-y=-7
• On line On line p: x = 4 + t, y = 3 + 2t, t is R, find point C, which has the same distance from points A [1,2] and B [-1,0].
• Roots and coefficient In the equation 2x ^ 2 + bx-9 = 0 is one root x1 = -3/2. Determine the second root and the coefficient b.
• On a line On a line p : 3 x - 4 y - 3 = 0, determine the point C equidistant from points A[4, 4] and B[7, 1].
• Geometric seq Find the third member of geometric progression if a1 + a2 = 36 and a1 + a3 = 90. Calculate its quotient.
• Algebra X+y=5, find xy (find the product of x and y if x+y = 5)
• Find parameters Find parameters of the circle in the plane - coordinates of center and radius: ?
• Square Suppose the square's sides' length decreases by a 25% decrease in the content area of 28 cm2. Determine the side length of the original square.
• Square root 2 If the square root of 3m2 +22 and -x = 0, and x=7, what is m?
• Trapezoid 15 Area of trapezoid is 266. What value is x if bases b1 is 2x-3, b2 is 2x+1 and height h is x+4

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