The solution set of equation x2 -7x+6=0
a) {1,6}
b) {-1,-6}
c) {-1,6}
d) {1,-6}
Solution:x2– 7x+6= 0 x2– 6x – x+6=0
x(x – 6)- 1(x – 6)=0
(x – 6)(x – 1)=0
x – 6=0 , x – 1=0
x=6 , x=1
What should be done to make the co-efficient of x2 equal to 1, in 7x2+2x-1=0
a) Multiply the equation be 7
b) Divide the equation by 7
c) Add 7 in both sides
d) Subtract 7 from both sides
The cancellation of x on both sides of the equation of the type ax2=bx
means the loss of one root. That root is always equal to
a) 0
b) 1
c) A
d) b
