f(5)=3(5)x^2+8(5)-9

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Solution for f(5)=3(5)x^2+8(5)-9 equation:


Simplifying
f(5) = 3(5) * x2 + 8(5) + -9

Reorder the terms for easier multiplication:
5f = 3(5) * x2 + 8(5) + -9

Multiply 3 * 5
5f = 15x2 + 8(5) + -9

Multiply 8 * 5
5f = 15x2 + 40 + -9

Reorder the terms:
5f = 40 + -9 + 15x2

Combine like terms: 40 + -9 = 31
5f = 31 + 15x2

Solving
5f = 31 + 15x2

Solving for variable 'f'.

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

Divide each side by '5'.
f = 6.2 + 3x2

Simplifying
f = 6.2 + 3x2

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