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Dau coroana! a) (1/2x+1)²= b)(3V5-2V3x)² c) (2V3-3V5)²= d) (7/8x-2)²=

Răspuns :

(1/2x+1)^2=1/4x^2+1/x+1
(3v5-2v3x)^2=9*5-2*2*3v15x+4*3x=40-12v15x+12x
(2v3-3v5)^2=4*3-2*2*3v15+9*5=12-12v15+40=52-12v15
(7/8x-2)^2=49/64x^2-7/2x+4
Sper ca stii formula (a+b)^2, deoarece toate acestea provin din aceasta formula