Hi! how do you solve this? step by step? ?

=30

Step-by-step explanation:

Substitute the variable

10(3)- (3(3)) (2(3))+ 3^2 (2(3))

Multiply the numbers

10×3-(3×3)×(2×3)+3^2×(2×3)

10×3-9×6+9×6

Eliminate the opposites

10×3=30       *9×6+9×6 these are the opposites

OR THERE'S ANOTHER WAY

10x-(3x)×(2x)×x^2×(2x)

Remove unnecessary parenthesis

10x-3x×2x×x^2×2x

Calculate the product

10x-6x^2+2x^3

Use the commutative property to reorder the terms

2x^3-6x^2+10x

Substitute the variable

2×3^3-6×3^2+10×3

=30

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225