Question

simplify the following using suitable identities
$\frac{38 { }^{2} - 18 {}^{2} }{56}$
​

Answer 1

Step-by-step explanation:

a2-b2= (a+b)(a-b)

38^2-18^2=(38+18)(38-18)=56×20

38^2-18^2/56 = 56×20/56=20