Question

Subtract the square of 42 from the square of 43 without actually calculating the squares. ​

Answer 1

Answer:

Given,

We need to Subtract the square of 42 from the square of 43 without actually calculating the squares.

Using the formula

${x}^{2} - {y}^{2} = (x + y)(x - y)$

We get....

$= > {(43)}^{2} - {(42)}^{2} \\ = > (43 + 42)(43 - 42) \\ = > 85 \times 1 \\ = > 85.$

Answer 2

$\huge{\underline {\underline {\green{Answer}}}}$

We know that,

a²-b²=(a+b)(a-b)

43²-42²

=(43-42)+(43+42)

=1×85

=85

$<font color = "red"><marquee>❤❤❤Thanks❤❤❤</marquee> </font>$