Question

(-3+√5)*(-3-√5), how do I solve this question?

Answer 1

Hi!!

By using the formula

(a+b)(a-b) =a²-b²

a= -3 , b= √5.

we can get

(-3+√5)(-3-√5)= (-3)²-(√5)²

9-5

4.

Thank you!!☺️

All the best.☘️

#HaKuNa MaTaTa @ Akshaymas.♥️

Answer 2

$( - 3 + \sqrt{5} ) \times ( - 3 - \sqrt{5)} \\ = { - 3}^{2} - { \sqrt{5} }^{2} \\ = 9 - 5 \\ = 4$
hope this helps you