Shari started to use the grouping method to factor the expression x^2 + 5x − 84 as shown.

Which expression could be the next step in completely factoring the expression?

A. x^2 + 12x + 7(x − 12)
B. x(x + 12 − 7) − 84
C. x(x − 12) + 7(x − 12)
D. x(x + 12) − 7(x + 12)

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x