The solutions of a quadratic equation are shown as 4 + 747. Which of the following
pairs of numbers is closest to the solutions of
the equation?
A. 11 and -3
B. 12 and -4
C. 18 and -10
D. 28 and -20

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

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a and c

for infinitely many solutions we require both left and right sides to be equal

distribute and simplify

a

14 - 8x = 20 - 8x - 6 = 14 - 8x ← both sides equal so infinite solutions

b

6x - 54 = 6x - 54 + x = 7x - 54 ← not equal

c

4x + 16 = 4x + 10 + 6 = 4x + 16 ← both sides equal so infinite solutions

d

5x - 40 + 10 = 5x + 10

5x - 30 = 5x + 10 ← not equal