(2y-3)do potegi drugiej to - (3y-2)(3y+2)= uprość wyrażenie
(2y -3)² - (3y -2)(3y+2) =
= 4y² -12y +9 -( 9y² -4) =
= 4y² -12y +9 -9y² +4 =
= -5y² -12y +13
Stosowane wzory:
(a - b)²= a² - 2ab + b²
a² - b² = (a -b)( a+b)
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(2y-3)do potegi drugiej to - (3y-2)(3y+2)= uprość wyrażenie
(2y -3)² - (3y -2)(3y+2) =
= 4y² -12y +9 -( 9y² -4) =
= 4y² -12y +9 -9y² +4 =
= -5y² -12y +13
Stosowane wzory:
(a - b)²= a² - 2ab + b²
a² - b² = (a -b)( a+b)