Question

Work out the value of y when a=6.5 and b=3.5 given that y=(a + b) (a-b)

Answer 1

The value of y when a=6.5 and b=3.5 using the formula y=(a+b)(a-b) is calculated by finding the sum and the difference of a and b, then multiplying them together to get y=30.

Step-by-step explanation:

To work out the value of y when a=6.5 and b=3.5 given that y=(a + b) (a-b), we need to plug in the given values of a and b into the equation. This yields:

y = (6.5 + 3.5) × (6.5 - 3.5)

Let's perform the arithmetic operations step by step:

1. Calculate the sum of a and b: 6.5 + 3.5 = 10.
2. Calculate the difference between a and b: 6.5 - 3.5 = 3.
3. Multiply the sum by the difference to get y: 10 × 3 = 30.

Therefore, the value of y is 30 when a is 6.5 and b is 3.5.