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What is the quadratic equation and area of a rectangle when its length is 7 cm greater than its width which is 3x cm?
Quadratic equation: 9x2-21x+12.25 = 0 Area: 36.75 square cm
What is 9x-21x?
9x-21x = -12
What is the perimeter of a right angle triangle when one side is 10.5 cm greater than the other side and has an hypotenuse of 25.5 cm?
Let the sides be x+10.5 and x:- Using Pythagoras: (x+10.5)^2 +x^2 = 25.5^2 So: x^2 +21x +110.25 +x^2 = 650.25 Transposing terms: 2x^2 +21x -540 = 0 Using the quadratic equation formula gives x a positive value of 12 Perimeter: 12+(12+10.5)+25.5 = 60 cm
What does x equal when 21x plus 9 equals 180?
21x + 9 = 180 21x = 180 - 9 21x = 171 x = 171/21 x = 8.143
What are the solutions of x2 minus 21x equals 72?
x2 - 21x = 72x2 - 21x - 72 = 0(x - 24) (x + 3) = 0x = 24x = -3
What is the quadratic equation and area of a rectangle when its length is 7 cm greater than its width which is 3x cm?
Quadratic equation: 9x2-21x+12.25 = 0 Area: 36.75 square cm
What is 9x-21x?
9x-21x = -12
What is the perimeter of a right angle triangle when one side is 10.5 cm greater than the other side and has an hypotenuse of 25.5 cm?
Let the sides be x+10.5 and x:- Using Pythagoras: (x+10.5)^2 +x^2 = 25.5^2 So: x^2 +21x +110.25 +x^2 = 650.25 Transposing terms: 2x^2 +21x -540 = 0 Using the quadratic equation formula gives x a positive value of 12 Perimeter: 12+(12+10.5)+25.5 = 60 cm
What does x equal when 21x plus 9 equals 180?
21x + 9 = 180 21x = 180 - 9 21x = 171 x = 171/21 x = 8.143
What is the answer to 21x plus 452 equals 32-84x?
21x+452 = 32-84x 21x+84x = 32-452 105x = -420 x = -4
What are the solutions of x2 minus 21x equals 72?
x2 - 21x = 72x2 - 21x - 72 = 0(x - 24) (x + 3) = 0x = 24x = -3
What is the answer to 9x equals 21x-3?
If: 9x = 21x-3 Then: x = 1/4 or 0.25
What are the solutions for the quadratic equation x2 minus 21x equals 72?
x2 - 21x = 72x2 - 21x - 72 = 0(x - 24) (x + 3) = 0x = 24x = -3
How do you factor 20x squared -5 equals 21x?
Make it equal zero by subtracting 21x from both sides. 20x2 - 21x - 5 factors to (4x - 5)(5x + 1)
What is the factorization of the trinomial below2x2 plus 21x plus 49?
2x2+21x+49 = (2x+7)(x+7)
What is the GCF of 14x and 21x?
7x
What is -6x-15x?
9
