Question

without actual calculations, solve 19^2 - 18^2.​

Answer 1

Answer:

a^2-b^2=(a+b)(a-b)

=(19+18)(19-18)

=(37)(1)

Answer=37

Answer 2

Answer:

X^2-Y^2=(X-Y)(X+Y)

Step-by-step explanation:

(19-18)*(19+18)

1*37

37