Tentukan perkalian aljabar berikut ini:

1. (5y²-8y) (5y²+8y)
2. (4x
²-3y²) (4x²+3y²)
3. (x-3) (x
²-2x+5)
4. (y+4) (4
²+4y+16)
5. (2x+7) (x
²+xy²)
6. (3x-y) (x
²+xy+y²)
7. (5x-7) (25x
²-5xy+y²)
8. ( 3x+27) (9x
²-6xy+4y²)

1
3.(x.x²)+(x.-2x)+(x+5)-(3.x²)-(3.-2x)-(3.5)= x³-2x²+5x-3x²+6x-15=x³-5x²+11x-15
4.(y.42)+(y.4y)+(y.16)+(4.4²)+(4.4y)+(4.16)=16y+4y²+16y+64+16y+64=48y+4y²+128
5.(2x.x²)+(2x.xy²)+(7.x²)+(7.xy²)=2x³+2x²y²+7x²+7xy²
6.(3x.x²)+(3x.xy)+(3x.y²)-(y.x²)-(y.xy)-(y.y²)=3x³+3x²y+3xy²-x²y-xy²-y³=3x³+2x²y+2xy²-y³
7.(5x.25x²)+(5x.-5xy)+(5x.y²)-(7.25x²)-(7.-5xy)-(7.y²)=125x³-25x²y+5xy²-175x²+35xy-7y²

Jawabanmu

2014-09-04T14:30:09+07:00
1. 25y4-16y2
2. 16x4-9y4
3. x3-5x2+11x-15
4. 4y2+48y+128
5. 2x3+2x2y2+7x2+7xy2
6. 3x3+2x2y+2xy2-y3

cat: y3 = y pangkat 3
kasih jalan donk kak!
7 sama 8 mna kk
nanti ya, lupa tadi bwt jalannya.nanti malam insyaallah
kak jadi gak please