Question

calculati (3√2+2)la a 2​

Answer 1

Aici folosim formula de calcul prescurtat

$(x + y)^{2} = {x}^{2} + 2 \times x \times y + {y}^{2}$

${(3 \sqrt{2} })^{2} + 2 \times 3 \sqrt{2} \times 2 + {2}^{2}$

$\sqrt{ {x}^{2} } = x$

$9 \times 2 + 12 \sqrt{2} + 4 \\ 18 + 12 \sqrt{2} + 4 \\ 22 + 12 \sqrt{2} = 2(11 + 6 \sqrt{2} )$