Matematika Sekolah Menengah Pertama tolong kakk mau dikumpulin sekarang:((​

amparoschroederulv – April 19, 2023

tolong kakk mau dikumpulin sekarang:((​

1. (1 + √2)(3 + √2) = 5 + 4√2

2. (2√3 + √2)(2√3 - √2) = 10

Pembahasan

–› No. 1

(1 + √2)(3 + √2)

= (3 + √2) + √2(3 + √2)

= (3 + √2) + (3√2 + 2)

= (3 + 2) + (√2 + 3√2)

= (3 + 2) + (1 + 3)√2

= 5 + 4√2

–› No. 2

(2√3 + √2)(2√3 - √2)

= (2√3)² - (√2)²

= (4√3√3) - 2

= (4 × 3) - 2

= 12 - 2

= 10