(2x2 - 4x – 5) + (10x2 + 3x)

Question

(2x2  - 4x – 5) + (10x2 + 3x)

anonymous · Answer

12x^2-x-5, solve for x using x = -b +or - (sqrt(b2-4ac)/2a)

anonymous · Answer

i dont understand

anonymous · Answer

is the equation

$$(2x ^{2}-4x-5) + 10x ^{2}+3x$$
?

anonymous · Answer

yes its subtracting polynomials

anonymous · Answer

then it becomes:
$$2x ^{2}+10x ^{2}-4x+3x-5 \rightarrow \rightarrow 12x ^{2}-x-5$$

anonymous · Answer

you are basically bunching up all the x^2 terms together, all the x terms together and all the constants together. If you are asked to solve this equation for x, then you can solve it using the formula i gave above for quadratic equations, but if you are not asked to solve for x, don't worry about it just yet.

anonymous · Answer

lol what he's trying to say is, let's expand it and you'll get :$$= 2x^2-4x-5 +10x^2 + 3x$$
let's add, and we'll get :
$$= 12x^2-x-5$$

done ^_^ , understand it now? :)

anonymous · Answer

lol, thats exactly it. sorry, my maths is a bit rusty. it's all kind of obvious to me.

anonymous · Answer

haha its ok but thank you