Current location - Training Enrollment Network - Mathematics courses - Classroom highlights the process of the tenth page of mathematics 16 and the eleventh page of nine years 12. I will. Still help me. Thank you.
Classroom highlights the process of the tenth page of mathematics 16 and the eleventh page of nine years 12. I will. Still help me. Thank you.
16. 1998 = 2 * 3 * 37, only the common factor 3 can be extracted, and the roots within √ 1998=3√666 cannot be separated.
Then √a and √b both have √666, so it is √666+2√666, and then find the sum of their squares.
12.{b times the root number a}+{a times the root number b} = √ ab (a? +b？ )/ab=(a？ +b？ )/√ab
(a？ +b？ )=(a+b)？ -2ab, the rest is not hard to calculate, is it?