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2. x^2 - 20x + 100
3. 9^2 + 24x + 16
4. 25x^2 - 70x + 49
5. 49a^2 - 42ab + 9b^2
6. 16a^2 + 72ab + 81b^2
7. 4p^4 + 60p^2 +225
8. 81p^4 - 180p^2 + 100
9. 36p^4 + 90p^2q + 25q^2
x^2 + xy + xy + y^2=
x^2 + (1+1)xy + y^2=
x^2 + 2xy + y^2
2) (x-10)(x-10)=
x^2-10x-10x+100=
x^2-(10-10)x+100=
x^2+100
3) (3x+4)(3x+4)=
9x^2+12x+9x^2+12x=
(9+9)x^2 + (12+12)x=
18x^2 + 24 x
4) (5x-7)(5x-7)=
25x^2-35x-35x+49=
25x^2-(35-35)x+49=
25x^2 + 49
5) (-7a+3b)(-7a+3b)=
49a^2 - 21ab - 21ab + 9b^2=
49a^2 - (21-21)ab + 9b^2=
49a^2 + 9b^2
6) (-4a-9b)(-4a-9b)=
16a^2+36ab+36ab+18b^2=
16a^2+(36+36)ab+18b^2=
16a^2+72ab+18b^2
7) (2p^2+15)(2p^2+15)=
4p^4+30p^2+30p^2+225=
4p^4+(30+30)p^2+225=
4p^4+60p^2+225
8) (9p^2-10)(9p^2-10)=
81p^4-90p^2-90p^2+100=
81p^4-(90-90)p^2+100=
81p^4+100
9) (-6p^2-5q)(-6p^2-5q)=
36^4+30p^2q+30p^2q+25q^2=
36^4+(30+30)p^2q+25q^2=
36^4+60p^2q+25q^2
10) (8p^2+3p)(8p^2+3p)(8p^2+3p)=
64p^4+24p^2+64p^4+24p^3+24p^3+9p^2+24p^3+9p^2=
(64+64)p^4+(24+9+24+9)p^2+(24+24+24)p^3=
128 p^4 + 66 p^2 + 72p^3
^=pangkat
maaf jika salah!