A^2+2ab-2c+(b-c)^2
a^2+2ab-2c+b^2-2bc+c^2
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3 + ( 10 / Х ) = X
3X + 10 = X^2
X^2 - 3X - 10 = 0
D = 9 + 40 = 49 ; √D = 7
X1 = ( 3 + 7) : 2 = 5
X2 = ( - 4 ) : 2= ( - 2 )
288 = 32*9 = 2⁵ * 3²
432 = 27 * 16 = 3³ * 2⁴
600 = 24*25 = 3*8*25 = 3¹ * 2³ * 5²
784 = 49 * 16= 7² * 2⁴