Question

a) Find the product of (x + y) and (x - y).
b) If the sum of two numbers is 17 and their difference is 5, find the
difference between their squares.​

Answer 1

Answer:

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product of (x + y) and (x - y).= x²-xy+xy-y²

product of (x + y) and (x - y).= = x²-y²

let the unknown number be x and y

Sum= x+y=17. .....1

difference=x-y=5. .......2

add both of the equation

2x=22

x=11

y=17-x

y=6