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Use FOIL to find the product. `(-4x-1)(-4x+9)` =
↑
X
MathQuill
Basic
General
Intervals
Inequalities
Functions
Trig
x
x
√
n
√
|
|
(
)
π
∞
DNE
x
√
(
)
π
∞
DNE
(
)
(
]
[
)
[
]
—∞
∞
∪
DNE
<
>
≤
≥
or
All Real Numbers
DNE
log
log
n
ln
n
√
|
|
e
sin
cos
tan
arcsin
arccos
arctan
⟨
⟩
∞
DNE
-∞
∞
∪
DNE
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