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Mathematics
Kareem
24 September, 02:53
Y = 2x² - 5x
y = - 3x + 4
+1
Answers (
1
)
Maya Andrade
24 September, 04:41
0
x = 2,-1
Step-by-step explanation:
first substitute the buttom function into the top one
y = 2x² - 5x
y = - 3x + 4
then
-3x + 4 = 2x² - 5x
add 3x and subtract - 4
0 = 2x^2 + 3x - 5x - 4
combine like terms
0 = 2x^2 - 2x - 4
now you have to find the zeros
take out a 2 from the equation
0 = 2 (x^2 - x - 2)
simplify
0 = 2 (x-2) (x+1)
solve for x
x-2=0 x = 2
x+1 = 0 x = - 1
therefore x = - 1,2
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