sederhanakanlah D.(√2+√5)(√2-√5) ,E.(2√5-3√3)(2√5+3√3)
Matematika
jeje154
Pertanyaan
sederhanakanlah D.(√2+√5)(√2-√5) ,E.(2√5-3√3)(2√5+3√3)
1 Jawaban
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1. Jawaban newwiguna
Rumus dasar :
(a + b)(a - b) = a² - b²
D. (√2 + √5)(√2 - √5) = (√2)² - (√5)² = 2 - 5 = -3
E. (2√5 - 3√3)(2√5 + 3√3) = (2√5)² - (3√3)² = (4 x 5) - (9 x 3) = 20 - 27 = -7