-(-2ab²+[tex]\frac{1}{4}[/tex]a²)² dla a =-4 i b=√2
-(-2* (-4) * (√2)²+[tex]\frac{1}{4}[/tex]* (-4)²)² = -(8*2+ [tex]\frac{1}{4}[/tex] *16)²= - (16+4)²=- (20)²=-400
