Completing The Square Quiz (100%)

Brian is solving the equation x2-3/4x=5. What value must be added to both sides of the equation to make the left side a perfect-square trinomial? 9/64 9/16 3/4 9/4

A. 9/64

Which value must be added to the expression x2 + 12x to make it a perfect-square trinomial? 6 36 72 144

B. 36

What are the solution(s) of x2-4=0? x=-4 or x=4 x=-2 or x=2 x=2 x=4

B. x=-2 or x=2

Solve for x in the equation x2-10x+25=35. x=5+-2 sqr5 x=5+-2 sqr35 x=10+-2 sqr5 x=10+-2 sqr35

B. x=5+-2 sqr35

Which value must be added to the expression x2 + 16x to make it a perfect-square trinomial? 8 32 64 256

C. 64

Amira is solving the equation x2 - 6x = 1. Which value must be added to both sides of the equation to make the left side a perfect-square trinomial? -9 8 9 36

C. 9

Use completing the square to solve for in the equation (x+7)(x-9)=25. x = -4 or 6 x = -2 or 14 x=1 +- sqr89 x=1 +- sqr87

C. x=1 +- sqr89

What are the solutions of x2+6x-6=10? x=-11 or x=1 x=-11 or x=-1 x=-8 or x=-2 x=-8 or x=2

D. x=-8 or x=2

Solve for x in the equation 2x2+3x-7=x2+5x+39. x=-6 +- sqr82 x=-6 +- 2sqr17 x=1 +- sqr33 x=1 +- sqr47

D. x=1 +- sqr47

Solve for x in the equation 2x2-5x+1=3. x=5/2 +- sqr29/2 x=5/2 +- sqr41/4 x=5/4 +- sqr29/2 x=5/4 +- sqr41/4

D. x=5/4 +- sqr41/4