Question

Please 1 -5 sama jalannya please

Answer 1

No. 1 
= 5x + 3y - 2 - y + y + 2
= 5x + 3y - y + y - 2 + 2
= 5x + 3y
Jawabannya tidak ada, kemungkinan kesalahan soal, mungkin soalnya:
= 5x + 3y - 2 - x + y + 2
= 5x - x + 3y + y - 2 + 2
= 4x + 4y ...... (B)

No. 2
= 5a²b - ab² - 7a²b + 6ab²
= 5a²b - 7a²b - ab² + 6ab²
= - 2a²b + 5ab², atau
= 5ab² - 2a²b .... (A)

No. 3
= (2P + 3Q - 4) + (P - 3Q + 2)
= 2P + P + 3Q - 3Q - 4 + 2
= 3P - 2 .... (B)

No. 4
= (6xy + 3yz + 4z) + (2xy + 4yz - 4z)
= 6xy + 2xy + 3yz + 4yz + 4z - 4z
= 8xy + 7yz ..... (A)

No. 5
= (7a² + 2a) - (6a² - 12a)
= 7a² - 6a² + 2a + 12a
= a² + 14a ...... (D)