Question

Przekształć na sumy algebraiczne: (a+9)^,(x+6)^,(a +3b)^,(10x+7y)^,(1,1a+4z)^,(x-1)^,(3x-7)^,(5x-2y)^,(3a^-2b)^,(a+8)(a-8),(4a -3)(4a+3),(x-11)(x+11).

Answer 1

( a + 9)² = a² + 18a + 81
( x+ 6)² = x² + 12x + 36
( a + 3b)²= a² + 6ab + 9b²
(10x + 7y)² = 100x² = 140xy + 49y²
( 1,1 a + 4z)²  = 1,21a² + 8,8 a z + 16z²
( x - 1)² = x² -2x + 1
( 3x - 7)² = 9x² - 42x + 49
( 5x - 2y)² =  25x² - 20 xy + 4y²
( 3a² - 2b)² = 9a( do czwartej) - 12 a² b + 4b²
( a+8 )( a-b) = a² + 8a - ab - 8b
( 4a - 3)( 4a + 3) = 16a² - 9
( x - 11)(x + 11) = x² - 121