Question

1. ( x + 2)² - ( x - 3 ) ( x + 3 ) - 2y = -1
2. (y - 8 )² - (y - 10 )² + 3x =14

Answer 1

1.(x²+4x+4)-(x²-9)-2y=-1
x²-x²+4x+4+9-2y=-1
4x-2y=-1-4-9
4x-2y=-14
2x-y=-7
2.(y²-16y+64)-(y²-20y+100)+3x=14
y²-y²-16y+20y+64-100+3x=14
4y+3x=14-64+100
4y+3x=50

Answer 2

1. ( x + 2)² - ( x - 3 ) ( x + 3 ) - 2y = -1
Ze wzorów skróconego mnożenia
x²+4x+4-(x²-9)-2y=-1
x²+4x+4-x²+9-2y=-1
4x+13-2y=-1
4x-2y=14
2x-y=7

2. (y - 8 )² - (y - 10 )² + 3x =14
y²-16y+64-(y²-20y+100)+3x=14
y²-16y+64-y²+20y-100+3x=14
4y-36+3x=14
4y+3x=50

Answer 3

1. ( x + 2)² - ( x - 3 ) ( x + 3 ) - 2y = -1
x²+4x+4-(x²-3²)-2y=-1
x²+4x+4-x²-9-2y=-1
x²+4x-x²-2y=-1-4+9
4x-2y=4

2. (y - 8 )² - (y - 10 )² + 3x =14
y²-16x+64-y²-20y+100+3x=14
y²-16x-y²-20y+3x=14-64-100
-13x-20y=-150