24² - 23² = (24 - 23)(24 + 23) = 47
X = 3y - 3
5( 3y - 3 ) - 2y = 11
15y - 15 - 2y = 11
13y = 26
y = 2
X = 6 - 3 = 3
Ответ ( 3 ; 2 )
<span>a) (5+x)</span>² = 25 +10x + x²<span>
б) (1-3x)</span>² = 1 - 6x + 9x²<span>
в) (3a-10b)</span>² = 9a² -60ab + 100b²<span>
г) (x</span>²<span> +4)</span>² = x⁴ + 8x² + 16<span>
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