Question

help with quadratic formula 2x^2 - 7x - 30 = 0

Answer 1

\[x=-b \pm \sqrt{b ^{2}-4ac}/2a\]

Answer 2

2x^2 - 7x-30 = 0
2x^2-12x+5x - 30 = 0
2x(x-6)+5(x-6) = 0
(x-6)(2x+5) = 0
x = 6,-5/2

Answer 3

let 2= a , b= 7, c= -30
just put into the formula

Answer 4

Hero is correct. Patissocoolike showed incorrect variables: let \[a=2 b=-7 c=-30\] the difference, of course, would be that b is -7 not 7

Answer 5

so does the -7 become 7 (-b)

Answer 6

correct, since b is -7 when the equation calls for a -b the correct input will be +7

Answer 7

thx

Answer 8

Just factor it

Answer 9

No need for quad formulas if it's factorable

Answer 10

it is -7 but in the formula you automatically know you must use the opposite sign of b