Question

15x ^ 2 - 28 = x by quadratic formula​

Answer 1

Answer: x=−4/3 or 7/5

Step-by-step explanation:

$15x^{2} -28-x=0$

=15$x^{2}$−(21x−20x)28=0

=15$x^{2}$−21x+20x−28=0

=3x(5x−7)+4(5x−7)=0

(3x+4)(5x−7)=0

3x+4=0 or 5x−7=0

x=−4/3 or 7/5