40x^2=41x+21

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Solution for 40x^2=41x+21 equation:


Simplifying
40x2 = 41x + 21

Reorder the terms:
40x2 = 21 + 41x

Solving
40x2 = 21 + 41x

Solving for variable 'x'.

Reorder the terms:
-21 + -41x + 40x2 = 21 + 41x + -21 + -41x

Reorder the terms:
-21 + -41x + 40x2 = 21 + -21 + 41x + -41x

Combine like terms: 21 + -21 = 0
-21 + -41x + 40x2 = 0 + 41x + -41x
-21 + -41x + 40x2 = 41x + -41x

Combine like terms: 41x + -41x = 0
-21 + -41x + 40x2 = 0

Factor a trinomial.
(-3 + -8x)(7 + -5x) = 0

Subproblem 1

Set the factor '(-3 + -8x)' equal to zero and attempt to solve: Simplifying -3 + -8x = 0 Solving -3 + -8x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -8x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -8x = 0 + 3 -8x = 0 + 3 Combine like terms: 0 + 3 = 3 -8x = 3 Divide each side by '-8'. x = -0.375 Simplifying x = -0.375

Subproblem 2

Set the factor '(7 + -5x)' equal to zero and attempt to solve: Simplifying 7 + -5x = 0 Solving 7 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -5x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -5x = 0 + -7 -5x = 0 + -7 Combine like terms: 0 + -7 = -7 -5x = -7 Divide each side by '-5'. x = 1.4 Simplifying x = 1.4

Solution

x = {-0.375, 1.4}

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