Write in expanded form using suitable identities (2x + 1 )^3
Answers
Answered by
1
Answer:
(2x)² + 1¹ + 3*(2x)²*1 + 3*1²*2x
= 4x² +1 + 12x² + 6x
= 16x² + 6x + 1
= 16x² - 8x + 2x - 1
= 8x(2x-1) +1(2x-1)
= (2x-1) ( 8x+1)
x=1/2
or
x=-1/8
Similar questions