Собъснениям 1.(x-2)^2 2.(8-2x) 3.(2y-7)(2y+7x) 4.(3x+12y)^2 - вопрос №8882306122282327274312251115698 от dogparrker 09.12.2020 02:01

Question

Алгебра: Собъснениям 1.(x-2)^2 2.(8-2x) 3.(2y-7)(2y+7x) 4.(3x+12y)^2 5.(11--15x) 6.(9+8x)^2 7.(11x^2-6)^2 8.(2x^2+3)^2 9.25x^2-9 10.(11x^2-6)^2 11.4x^2-25

dogparrker · Answer

1. х^2-2*2х+2^2 = х^2-4х+42. ??3. (2у)^2-(7х)^2 = 4у^2 - 49х^24. (3х)^2+2*3х*12у+(12у)^2=9х^2+72ху+144у^25. -(11-15х)(11+15х)=-(11^2-(15х)^2)=-121+225х^26. 9^2+2*9*8х+(8х)^2=81+144х+64х^27. (11х^2)^2-2*(11х^2)*6+6^2=121х^4-132х^2+368. (2х^2)^2+2*(2х^2)*3+3^2=4х^4+12х^2+99. (5х)^2-3^2=(5х-3)*(5х+3)10. (11х^2)^2-2*(11х^2)*6+6^2=121х^4-132х^2+3611. (2х)^2-5^2=(2х-5)*(2х+5)...