Question

4 root 5 minus 3 root 2 multiplied by 4 root 5 plus 3 root 2

Answer 1

Step-by-step explanation:

$(4 \sqrt{5} - 3 \sqrt{2} )(4 \sqrt{5} + 3 \sqrt{2} )$

Now by identity

(a - b)( a + b) = a² - b²

${4 \sqrt{5} }^{2} - {3 \sqrt{2} }^{2} \\ \\ 16 \times 5 - 9 \times 2 \\ \\ 80 - 18 \\ \\ = 62$

So 62 is the answer