Wykonaj działania.
Przykłady w załączniku. Bardzo proszę o pomoc ;)
a)(4x-5)^2 + (5+4x)^2=16x^2 -40x+25+25+40x+16x^2=32x^2+50
b)(2x-1)^2-4(x-3)(x+3)=4x^2-2x+1-4(x^2+9)=4x^2-4x+1-4x^2-36=-4x-35
c)(x+2y)^2-(x+2y)(x-2y)+2(x-2y)^2+4xy=x^2+4xy+4y^2-(x^2-4y^2)+2(x^2-4xy+4y^2+4xy
= x^2+4xy+4y^2-x^2+4y^2+2x^2-8xy=8y^2+4xy=2x^2+12y^2
d)(a-2b)(3z+b)-3(a-b)^2=3a^2+ab-6ab-3(a^2-2ab+b^2)=3a^2=ab-6ab-3a^2+6ab-3b^2=-3b^2+ab
e)(5a-1)^2+(5a-1)^2-(5a+1)(5a-1)-25a^2=25a^2+10a+1+25a^2-10a+1-25a^2+1-25a^2=3
f)(x+3y)(3y-x)-2(x-2)^2+3(x^2-3y^2)=-x^2+9y^2-2x^2+8x-8+3x^2-9y^2=8x-8
Mam nadzieję, że pomogłam. Jeżeli tak daj naj ;))
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a)(4x-5)^2 + (5+4x)^2=16x^2 -40x+25+25+40x+16x^2=32x^2+50
b)(2x-1)^2-4(x-3)(x+3)=4x^2-2x+1-4(x^2+9)=4x^2-4x+1-4x^2-36=-4x-35
c)(x+2y)^2-(x+2y)(x-2y)+2(x-2y)^2+4xy=x^2+4xy+4y^2-(x^2-4y^2)+2(x^2-4xy+4y^2+4xy
= x^2+4xy+4y^2-x^2+4y^2+2x^2-8xy=8y^2+4xy=2x^2+12y^2
d)(a-2b)(3z+b)-3(a-b)^2=3a^2+ab-6ab-3(a^2-2ab+b^2)=3a^2=ab-6ab-3a^2+6ab-3b^2=-3b^2+ab
e)(5a-1)^2+(5a-1)^2-(5a+1)(5a-1)-25a^2=25a^2+10a+1+25a^2-10a+1-25a^2+1-25a^2=3
f)(x+3y)(3y-x)-2(x-2)^2+3(x^2-3y^2)=-x^2+9y^2-2x^2+8x-8+3x^2-9y^2=8x-8
Mam nadzieję, że pomogłam. Jeżeli tak daj naj ;))