ZAPISZ W POSTACI JAK NAJPROSTRZEJ SUMY ALGEBRAICZNEJ:
a)(x+1)(x+4)
b)2(2x+3)(2x-1)
c)-(x+7)(x-3)
d)1-(z+5)(z-1)
e)2k²-(k+3)(2k+4)
f)-3(a+2b)(a-b)+3a²
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a)(x+1)(x+4) = x²+4x+x+4 = x²+5x+4
b)2(2x+3)(2x-1) = 2(4x²-2x+6x-3) = 8x²-8x-6
c)-(x+7)(x-3) = -(x²-3x+7x-21) = -x²+3x-7x+21 = x²-4x+21
d)1-(z+5)(z-1) = 1-(z²-z+5z-5)=1-(z²-4z-5) = 1-z²-4x-5
e)2k²-(k+3)(2k+4) = 2k²-(2k²+4k+6k+12)=10k+12
f)-3(a+2b)(a-b)+3a² = -3(a²-ab+2ab-2b²)+3a²=-3(a²+ab-2b²)+3a²=-3a²-3ab+6b²+3a²=-3ab+6b²