Learn Let Fx X2 3x 4 And Gx X 5 Find Fx Gx

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# Let f(x) = x^{2} + 3x - 4 and g(x) = x + 5. Find f(x) . g(x) ?

**Solution:**

Given, f(x) = x^{2} + 3x - 4 and g(x) = x + 5.

We have to find f(x) . g(x)

f(x) . g(x) = (x^{2} + 3x - 4) (x + 5)

Using the multiplicative distributive property

f(x) . g(x) = x^{3} + 5x^{2} + 3x^{2} + 15x - 4x - 20

So we get

f(x) . g(x) = x^{3} + 8x^{2}+ 11x - 20

Therefore, f(x) . g(x) is x^{3} + 8x^{2}+ 11x - 20.

## Let f(x) = x^{2} + 3x - 4 and g(x) = x + 5. Find f(x) . g(x) ?

**Summary:**

If (x) = x^{2} + 3x - 4 and g(x) = x + 5, the value of f(x) . g(x) is x^{3} + 8x^{2}+ 11x - 20.

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