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( 3 x + 4 ) ² - ( 1 - 2 x )  (  6 + x )

Sagot :

( 3 x + 4 ) ² - ( 1 - 2 x )  (  6 + x )
=9x²+24x+16-(6+x-12x-2x²)
=9x²+24x+16+2x²+11x-6
=11x²+35x+10
( 9x²+24x+16 ) - ( 6 + x - 12x - 2x² ) 
9x²+24x+16-6-x+12x+2x²
11x²+35x10x