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Combine like terms. What is the simplest form of the expression?

`3(5-x)+4x(3x+2)`
*HINT: Don't forget that `x(x)=x^{2}`

1 answer

To simplify the expression `3(5-x)+4x(3x+2)`, we can distribute the coefficients:

= `3*5-3*x+4*x*3*x+4*x*2`
= `15-3x+12x^2+8x`

Thus, the simplest form of the expression is `12x^2 + 5x + 15`.
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