Question

simplify (-3-root5)(-3+root5) pls step by step find the answer

Answer 1

Answer:

(-3-√5)(-3+√5)=4

Step-by-step explanation:

Given that,

(-3-√5)(-3+√5)

as we know that,

(a-b)(a+b)=a²-b²

consider,

a=-3 & b=√5

now,

(-3-√5)(-3+√5) = (-3)²-(√5)²         (according to the formula)

=>(-3-√5)(-3+√5) = 9-5

=>(-3-√5)(-3+√5) = 4

therefore,

(-3-√5)(-3+√5)=4

HOPE THIS WOULD BE HELPFUL FOR YOU

Answer 2

Answer:

Step-by-step explanation:

-(3+√5)* (-3-√5)

1. (a+b)*(a-b) = a²-b²

• = (-3)²-(√5)²

• = 9-5

• = 4