Question

1.7x-9y+3-3x-5y+8
2.3x²+5xy-4y²+x²-8xy-5y²

Answer 1

Answer:

1. 7x-9y+3-3x-5y+8

collect like terms

= 4x-9y+3-5y+8

= 4x-14y+3+8

= 4x-14y+11

2. 3x^2+5xy-4y^2+x^2-8xy-5y^2

collect like terms

= 4x^2+5xy-4y^2-8xy-5y^2

= 4x^2-3xy-4y^2-5y^2

= 4x^2-3xy-9y^2

Step-by-step explanation:

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