Answer:
x = 1
Step-by-step explanation:
Given in the question the equation
y = -x² + 2x - 1
To find the x-intercept, substitute in 0 for y
0 = -x² + 2x - 1
To find value of x use quadratic equation
x = -b ± √b²-4ac / 2a
here a = -1
b = 2
c = -1
x1 = -2 + √2²-4(-1)(-1) / 2(-1)
= -2 + 0 / -2
= -2 / -2
= 1
x2 = -2 - √2²-4(-1)(-1) / 2(-1)
= -2 - 0 / -2
= -2 / -2
= 1
Answer:
A
Step-by-step explanation:
is A just put A ok this going i help you you welcome
Answer:
x=−3
Step-by-step explanation:
−x+3=6
Step 1: Subtract 3 from both sides.
−x+3−3=6−3
−x=3
Step 2: Divide both sides by -1.
−x
−1
=
3
−1
x=−3
