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5 questions
Expand (4x − 5)(4x + 5).
4x2 − 25
4x2 + 25
16x2 + 25
16x2 − 25
Expand (x−4)2.
x2 −8x+16
x2 −8x−16
x2 +8x+16
x2 −16
(4a+2b)2=
16a2+8ab−4b2
16a2−8ab−4b2
16a2−8ab+4b2
16a2+8ab+4b2
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