Question

(√3 + √2)(√3 − √2) − (√ 7+ 3)(√7 −3 )

Answer 1

(a + b)(a - b) = a² - b²

((√3)² - (√2)²) - ((√ 7)²-3²)

se van las raíces:

(3 - 2)-(7 - 9)

(1)-(-2)

1 + 2 = 3