cara kerja dan jawaban?

1. 8p-3+(-3p)+8
= 8p-3p-3+8
= 5p+5

2. 9p²-4pq-q²-4p²+5pq-3q²
= 9p²-4p²-4pq+5pq-q²-3q²
= 5p²+pq-4q²

3. 2(-8a-3b)-4a+9b
= -16a-6b-4a+9b
= -16a-4a-6b+9b
= -20a+3b

4. xy(x²-4)
= x³y-4xy

5. (3-a)(5+a)
= 3(5+a)-a(5+a)
= 15+3a-5a-a²
= 15-2a-a² atau -a²-2a+15

6. (3m+2n)(3m-2n)
= 3m(3m-2n)+2n(3m-2n)
= 9m²-6mn+6mn-4n²
= 9m²-4n²

Maaf cuma sampai sini aja

1) 8p - 3 + (-3p) +8
= 8p - 3p - 3 + 8
= 5p + 5

2) 9p^2 - 4pq - q^2 - 4p^2 + 5pq
= 5p^2 + pq - q^2

3) 2( -8a - 3b ) - 4a + 9b
= -16a - 6b - 4a + 9b
= -20a + 3b

4) xy( x^2 - 4)
= x^(3)y - 4xy

5) ( 3 - a ) ( 5 + a)
= 15 + 3a - 5a - a^2
= a^2 - 2a + 15

6) ( 3m + 2n )( 3m + 2n ) karena suku sama dan perkalian + -, maka kalikan depan dg depan, belakang dengan belakang.
= 9m^2 + 4n^2

7) ( 2 + a ) ( a^2 - 2a + 1 )
= 2a^2 - 4a + 2 + a^3 - 2a^2 + a
= a^3 - 3a + 2

no.8 lewat foto :) semoga dapat membantu