Question

find the product of (4+3√5) (4-3√5)​

Answer 1

Answer:

- 29

Step-by-step explanation:

(4+3√5)(4-3√5)

It is in the form of (a+b)(a-b)

$(a + b)(a - b) = (a {}^{2} - b {}^{2} )$

therefore a=4 and b=3√5

=[ (4)² - (3√5)² ]

=[ 16 - 45 ]

=[ -29 ]

Answer 2

(4+3√5)(4-3√5)

=4×4 - 12√5 + 12√5 + 3√5×3√5

=16 - 45

= -29