(-x+9)(-x-9) - prefect square
(xy + x)(xy + x) - perfect square
(2x-3)(-3+2x) - not a perfect square
(16- x²)(x2 – 16) - not a perfect square
(4y? +25)(25+4y?) - not a perfect square
The answer is D because it passes the horizontal line test.
Answer:
x = -1, 3.
Step-by-step explanation:
x2 - 2x = 3
Completing the square:
We use the identity: a^2 - bx = (a - b/2)^2 - (b/2)^2:
(x - 1)^2 - 1^2 = 3
(x - 1)^2 = 3 + 1
(x - 1)^2 = 4
Taking square roots of both sides
x - 1 = +/- 2
x = 2 + 1 , -2 + 1
x = -1, 3.
Answer:
Step-by-step explanation:
.1 for each maybe?
:)
(10 x 5) + (2 to the 3rd power)
