Question

3 + 23x - 8x² = ? 

A. (1 - 8x)(3 + x) 

B. (1 + 8x)(3 - x) 

C. (1 - 8x)(3 - x) 

D. none of these

Answer 1

3 + 23x - 8x² 

By using Splitting the middle term 

= 3 + 23x - 8 x² 

= 3 + (24 - 1)x - 8 x² 

= 3(1 + 8x) - x(1 + 8x) 

= (1 + 8x)(3 - x)