Plz me simplify: square root of 9x^3+xsquared 100x-squared 36x^3

solve for x: solve for x square root x-3+8=12
a. x=5
b. x=7
c. x=19
d. x=50

Idk what you're trying to say for the first question, but the second one is B: x = 7

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.