soal : 1. (3y-5)+(2y+7) 2. (y²+3y)+(y²+5y) 3. (3x²+4) + (12-2x²) 4. (5xy+3x²) + (5x²-3xy) 5. (7x²+9y²)+(5x²-8y²) tolong dijawab memakai caranya ya Bsk harus dik
Matematika
mtk02
Pertanyaan
soal :
1. (3y-5)+(2y+7)
2. (y²+3y)+(y²+5y)
3. (3x²+4) + (12-2x²)
4. (5xy+3x²) + (5x²-3xy)
5. (7x²+9y²)+(5x²-8y²)
tolong dijawab memakai caranya ya
Bsk harus dikumpulin,mksh bgt yg udh mw jwb
1. (3y-5)+(2y+7)
2. (y²+3y)+(y²+5y)
3. (3x²+4) + (12-2x²)
4. (5xy+3x²) + (5x²-3xy)
5. (7x²+9y²)+(5x²-8y²)
tolong dijawab memakai caranya ya
Bsk harus dikumpulin,mksh bgt yg udh mw jwb
1 Jawaban
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1. Jawaban AisyahEsah
1. (3y-5)+(2y+7)
=(6y^2+21)+(-10y-35)
=6y^2+(-10y)-14
2.(3x^2+4)+(y^2+5y)
=3xy^4+15x^2y+4y^2+20y
3.(3x^2+4)+(12-2x^2)
=36x^2+6x^4+48-8x^2
=36x^2-8x^2+6x^4+48
=28x^2+6x^4+48
4. (5xy+3x^2)+(5x^2-3xy)
=25x^3y-15xy^2+15x^4-9x^2y
5. (7x^2+9y^2)+(5x^2-8y^2)
=35x^4-56x^2y^2+45x^2y^2-72y^4