Which of the equations has only one solution

x2+2x+1=0

x2-7x+56=0

x2-8x-49=0

the solution is h=10 because you add 9 to each side of the equation.

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?

you have to wait a while to reward brainliest if only one person answers. if 2 people answer there should be a "mark brainliest" on their question.

i cant fully remember all of the ranks, here are the ones i remember.

hand, ambitous, ace, genius.