Question

EX 5 VA IMPLOOOOOOR URGEEEEEEENT​

Answer 1

Răspuns:

Explicație pas cu pas:

5a

√54/√2 = √54/2 = √27 = 3√3

√24/√2 = √24/2 = √12 = 2√3

(√3 - 2)(√3 + 2) = 3 - 4 = -1

(√54 + √24)(√2)^-1 + (√3 - 2)(2 + √3) = 3√3 + 2√3 - 1 = 5√3 - 1

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5b

1 - 2/5 = 3/5

6 km = 3/5 din drum

Drumul = 5/5

Drumul = 6 : 3 x 5 = 10 km

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5c

(2x - 3)(2x + 3) = 7

4x^2 - 9 = 7

4x^2 = 9 + 7 = 16

x^2 = 16 : 4 = 4

x1 = 2

x2 = -2