Câu 1:

a) \(2\sqrt{4}+3\sqrt{25}\)= \(2\sqrt{2^2}+3\sqrt{5^2}\)=\(2.2+2.5=4+15=19\)

b) \(2x-10>0\Leftrightarrow2x>10\Leftrightarrow x>\dfrac{10}{2}\Leftrightarrow x>5\)

c) \(\left(3x-1\right)\left(x-2\right)-3\left(x^2-4\right)=0\\ \Leftrightarrow3x^2-6x-x+2-3x^2+12=0\)

\(\Leftrightarrow14-7x=0\\ \Leftrightarrow-7x=-14\\ \Leftrightarrow x=2\)

Mark the letter A, B C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

This new magazine is known for its comprehensive coverage of news

A. casual

B. indifferent

C. inadequate

D. superficial

Phép lai nào dưới đây có khả năng cho đời con có ưu thế lai cao nhất?

A. AABBDDEE x aaBBDDee

B. AABBddEE x AAbbccEE

C. AABBddEE x aabbDDee

D. aaBBddee x aabbDDee