y(10y+40)=210

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Solution for y(10y+40)=210 equation:


Simplifying
y(10y + 40) = 210

Reorder the terms:
y(40 + 10y) = 210
(40 * y + 10y * y) = 210
(40y + 10y2) = 210

Solving
40y + 10y2 = 210

Solving for variable 'y'.

Reorder the terms:
-210 + 40y + 10y2 = 210 + -210

Combine like terms: 210 + -210 = 0
-210 + 40y + 10y2 = 0

Factor out the Greatest Common Factor (GCF), '10'.
10(-21 + 4y + y2) = 0

Factor a trinomial.
10((-7 + -1y)(3 + -1y)) = 0

Ignore the factor 10.

Subproblem 1

Set the factor '(-7 + -1y)' equal to zero and attempt to solve: Simplifying -7 + -1y = 0 Solving -7 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1y = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1y = 0 + 7 -1y = 0 + 7 Combine like terms: 0 + 7 = 7 -1y = 7 Divide each side by '-1'. y = -7 Simplifying y = -7

Subproblem 2

Set the factor '(3 + -1y)' equal to zero and attempt to solve: Simplifying 3 + -1y = 0 Solving 3 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1y = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1y = 0 + -3 -1y = 0 + -3 Combine like terms: 0 + -3 = -3 -1y = -3 Divide each side by '-1'. y = 3 Simplifying y = 3

Solution

y = {-7, 3}

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