Question

(please give me answer in image)

Q. Subtract the following expressions:-

(a). 6a-3b from -8a + 9b
(b). -3x-4z from 9x + 8y + 9z
(c). -15a from 20a
(d). -a (power of 2) + ab - b ( power of 2) from a ( power of 2) + ab -3b ( power of 2)​

Answer 1

1). -8a + 9b - 6a - 3b

-14a + 6b

2). 9x + 8y + 9z - (-3x - 4z)

9x + 8y + 9z + 3x + 4z

12x + 8y + 13z

3). 20a - (-15a)

20a + 15a = 35a

4). a² + ab - 3b²- (-a²) + ab - b²

a² + ab - 3b² + a² + ab - b²

2a² + 2ab - 4b²

Answer 2

Step-by-step explanation:

-8a+9b-6a+3b=-14a+12b

9x+8y+9z+3x+4z=12x+8y+13z

20a +15a=35a

A^2+ab-9b^2-a^2-ab+b^2=-7b^2