Question

numarul ( 5 radical din 72-2 radical din 18+3 radical din 32) : radical din 8 calculat este.....

Answer 1

$(5 \sqrt{72} -2 \sqrt{18} +3 \sqrt{32} ): \sqrt{8} =(5*6 \sqrt{2} -2*3 \sqrt{2} +3*4 \sqrt{2} ):2 \sqrt{2} = \\ =(30 \sqrt{2} -6 \sqrt{2} +12 \sqrt{2} ):2 \sqrt{2} =36 \sqrt{2} :2 \sqrt{2} =18$

Answer 2

(5√72-2√18+3√32):√8; (5*3√8-2*3√2+3*4√2):√8; ( 15√8-6√2+12√2):√8; ( 15√8+6√2):√8= 15+ ( 6√2:√8 )= 15+ 6/2= 15+ 3 = 18