Wykonaj mnożenie:
a) (a+1)(a-1)
b) (x-15)(x-1)
c) (4+x)(x-8)
d) (3a-2b)(a+b)
^ do kwadratu
a) (a+1)(a-1) = a^ - 1
b) (x-15)(x-1) = x^ - 1x - 15x + 15 = x^ - 16x + 15
c) (4+x)(x-8) = 4x - 32 + x^ - 8x = 12x - 32 +x^
d) (3a-2b)(a+b) =3a^ +3ab - 2ab - 2b^ = 3a^ + ab - 2b^
a) a² - 1
b) x² -16x + 15
c) 4x - 32 + x² - 8x = x² - 4x - 32
d)3a² + 3ab - 2ab - 2b² = 3a² + ab - 2b²
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^ do kwadratu
a) (a+1)(a-1) = a^ - 1
b) (x-15)(x-1) = x^ - 1x - 15x + 15 = x^ - 16x + 15
c) (4+x)(x-8) = 4x - 32 + x^ - 8x = 12x - 32 +x^
d) (3a-2b)(a+b) =3a^ +3ab - 2ab - 2b^ = 3a^ + ab - 2b^
a) a² - 1
b) x² -16x + 15
c) 4x - 32 + x² - 8x = x² - 4x - 32
d)3a² + 3ab - 2ab - 2b² = 3a² + ab - 2b²