Question

evaluate 2.5×2.5-1.5×1.5/2.5-1.5​

Answer 1

Question:-

• Evaluate the expression.

Solution:-

$\sf \frac{2.5 \times 2.5 - 1.5 \times 1.5}{2.5 - 1.5}$

Let a=2.5 and b=1.5

So,

$\sf \frac{2.5 \times 2.5 - 1.5 \times 1.5}{2.5 - 1.5}$

$\sf = \frac{ ({a}^{2} - {b}^{2} )}{(a - b)}$

$\sf = \frac{(a + b) \cancel{(a - b)}}{ \cancel{(a - b)}}$

$\sf = a + b$

$\sf = 2.5 + 1.5$

$\sf = 4$

Hence, the required answer is 4.