Question

7x^2-2x+1-(9x^2+2x-1)

Answer 1

Answer:

$-2x^2-4x+2$

Step-by-step explanation:

$(7x^2-2x+1)-(9x^2+2x-1)=\\(7x^2-9x^2)+(-2x-2x)+(1+1)=\\-2x^2-4x+2$

Hope this helps!

Answer 2

(7x2-2x-1)+(9x2-4x+5)-(4x2+6x-7)

Final result :

12x2 - 12x + 11
Step by step solution :

Step 1 :

Equation at the end of step 1 :

((((7•(x2))-2x)-1)+(((9•(x2))-4x)+5))-((22x2+6x)-7)
Step 2 :

Equation at the end of step 2 :

((((7•(x2))-2x)-1)+((32x2-4x)+5))-(4x2+6x-7)
Step 3 :

Equation at the end of step 3 :

(((7x2-2x)-1)+(9x2-4x+5))-(4x2+6x-7)
Step 4 :

Trying to factor by splitting the middle term

4.1 Factoring 12x2-12x+11