Question

expand and simplify (5 + √2)(5 - √2)

Answer 1

Answer:

Answer is 23.

Step-by-step explanation:

(5 + √2) ( 5 - √2)

→ (5 × 5 + 5× (-√2) + 5 × √2 + √2 ×(-√2)

→ ( 25 - 5√2 + 5√2 - 2 )

→ ( 25 - 2 )

→ 23.

Answer 2

23

Using (a+b)(a-b) = $a^2-b^2$

$(5)^2-(\sqrt{2})^2$

25-2

23

Hope it helps u

Have a great day ahead

Annyeong