Use the quadratic formula and a=4, b=3, c=-4
2x^2+20x=-38 divide both sides by 2
x^2+10x=-19, halve the linear coefficient, square it, than add that value to both sides of the equation, in this case add (10/2)^2=25...
x^2+10x+25=6 now the left side is a perfect square
(x+5)^2=6 take the square root of both sides
x+5=±√6 subtract 5 from both sides
x=-5±√6 (so answer c.)
Answer:
-12
Step-by-step explanation:
-7+(-5)=
-7-5=
-12
This is my expression: 45h + 125. I hope this helps.
(20 + 12) - 8, since the question states n is EIGHT less than the sum of 20 and 12.
