28a^2-15a+2=0

Solution for 28a^2-15a+2=0 equation:

Simplifying
28a2 + -15a + 2 = 0

Reorder the terms:
2 + -15a + 28a2 = 0

Solving
2 + -15a + 28a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(1 + -4a)(2 + -7a) = 0

Subproblem 1
Set the factor '(1 + -4a)' equal to zero and attempt to solve:

Simplifying
1 + -4a = 0

Solving
1 + -4a = 0

Move all terms containing a to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + -4a = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -4a = 0 + -1
-4a = 0 + -1

Combine like terms: 0 + -1 = -1
-4a = -1

Divide each side by '-4'.
a = 0.25

Simplifying
a = 0.25
Subproblem 2
Set the factor '(2 + -7a)' equal to zero and attempt to solve:

Simplifying
2 + -7a = 0

Solving
2 + -7a = 0

Move all terms containing a to the left, all other terms to the right.

Add '-2' to each side of the equation.
2 + -2 + -7a = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -7a = 0 + -2
-7a = 0 + -2

Combine like terms: 0 + -2 = -2
-7a = -2

Divide each side by '-7'.
a = 0.2857142857

Simplifying
a = 0.2857142857
Solution
a = {0.25, 0.2857142857}