Question

Write the quadratic equation ax2 + bx + c=0. Then find the roots of each resulting equation.

ax2+bx+c=0
1.)a=1,b=5,c=4 _________
2.)a=2,b=1,c=-21 _________

Roots:
_____
_____

Answer 1

Step-by-step explanation:

1) x2+5x+4=0

x2+x+4x+4=0

x(x+1)+4(x+1)=0

(x+4)(x+1)=0

x= -4. x= -1

2) 2x2+x+21=0

2x2+6x+7x+21=0

2x(x+3)+7(x+3)=0

(2x+7)(x+3)=0

2x+7=0. x+3=0

x=-7/2. x= -3