Question

find the following by using a suitable identity
1.(x-10)(x+9)
2.(y-4)(y+3)
3.(x-4)(x-14)
4.(x-8)(x-2)
5.(x-6)(x-9)
6.(z+6)(z-5)​

Answer 1

Step-by-step explanation:

1. (x-10)(x+9). identity (x-y)(x+y)

x²+9x-10x-9

x²-x-9

2. (y-4)(y+3) identity (x-y)(x+y)

y²+3y-4y-12

y²-x-12

3. (x-4)(x-14).

x²-14x-4x+56

x²-18x+56

4. (x-8)(x-2)

x²-2x-8x+16

x²-10x+26

5. (x-6)(x-9)

x²-9x-6x+54

x²+15x+54

6. (z+6)(z-5)

z²-5z+6z-30

z²+z-30