Question

(2x - 9) (x + 4) = 0
What the answer

Answer 1

x = 9/2 and x = -4

Explanation:

you can set each expression in the parenthesis' equal to zero. this is due to it being multiplication so if one parenthesis equals 0, the answer will be 0

2x - 9 = 0 and x + 4 = 0

starting with 2x-9=0

add 9 to both sides

2x = 9

divide by 2

x = 9/2

then do x + 4 = 0

subtract 4

x = -4

so your two answers are

x = 9/2 and x = -4

Answer 2

x = 4.5 AND x = -4

Explanation:

for the first answer

add 9 to 0 and divide by 2

for the second answer

subtract 4