If -4 is one solution to the equation x^2 + bx + c = 0, where b and c are constants, and b + c = -21, what is the other solution?

A) -5

B) -1

C) 5

D) 7

E) 10

Question

If -4 is one solution to the equation x^2 + bx + c = 0, where b and c are constants, and b + c = -21, what is the other solution?

A) -5

B) -1

C) 5

D) 7

E) 10

Raju · Answer

b=&nbsp; -21-c(-4)^2+(-21-c)(-4)+c=0c= -20b= -1x^2-x-20=0(x+4)(x-5)=0other solution: x=5Answer. C

If -4 is one solution to the equation x^2 + bx + c = 0, where b and c are constants, and b + c = -21, what is the other solution?A) -5B) -1C) 5D) 7E) 10