4r^2-7r-28r+49=

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Solution for 4r^2-7r-28r+49= equation:


Simplifying
4r2 + -7r + -28r + 49 = 0

Reorder the terms:
49 + -7r + -28r + 4r2 = 0

Combine like terms: -7r + -28r = -35r
49 + -35r + 4r2 = 0

Solving
49 + -35r + 4r2 = 0

Solving for variable 'r'.

Factor a trinomial.
(7 + -4r)(7 + -1r) = 0

Subproblem 1

Set the factor '(7 + -4r)' equal to zero and attempt to solve: Simplifying 7 + -4r = 0 Solving 7 + -4r = 0 Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -4r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -4r = 0 + -7 -4r = 0 + -7 Combine like terms: 0 + -7 = -7 -4r = -7 Divide each side by '-4'. r = 1.75 Simplifying r = 1.75

Subproblem 2

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

Solution

r = {1.75, 7}

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