Question

(i) 21x2 = 4 (2x + 1)​

Answer 1

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Answer 2

Answer:

21x 2 =4(2x+1)

21x2=8x+4

21x2 −8x−4=0

x= 2a−b± b²-4ac

x= 2⋅21−(−8)± (−8)2 −4⋅21(−4)

x= 32 ,− 72

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