Answer:
A.
Step-by-step explanation:
C and D do not create any x² terms when doing the multiplications. so, they are out.
B stands for (a+b)×(a-b) = a² - b².
so, that would give us a "-4" at the end and is not fitting to the "+4" term at the end of the original expression.
that leaves us with A.
let's verify :
(4x+2i)(4x-2i)
it follows the same rule as B :
(a+b)(a-b) = a² - b²
a = 4x
b = 2i
you remember, i = sqrt(-1).
so, we get
(4x)² - (2i)² = 16x² - 4×(sqrt(-1))² = 16x² - 4×(-1) = 16x²+4
bingo !
<span>This is the answer b = 60
</span>
Answer:
A
Step-by-step explanation:
Describe the plotted points in the translation. so when Figure A moves over to figure b write down the points that it goes over. Does that make sence?
Answer:
X less than 10
Step-by-step explanation:
The problem is set up 2x - 8 < 12. Add 8 to both sides to get 2x <20. Divide by 2 to get x < 10