Question

1. Find four rational numbers between 2 5 and 3 5
2. Add: (2√3 + 5√2) and (√3 + 2√2)
3. Write the co-efficient of 2 in ( − 1)(3 − 4)
4. Use suitable identities to find ( + 8)( + 10)
please help guys​

Answer 1

Step-by-step explanation:

ans 1 : Hence, 9/20, 10/20 and 11/20 are three rational numbers between 2/5 and 3/5.

ans 3 : The given polynomial can be written as:

(x−1)(3x−4)=3x2−4x−3x+4

=3x2−7x+4

So, coefficient of x2 in the given polynomial is 3.

ans 4: Suitable identity is (x+a)(x+b)=x2+(a+b)x+ab

(x+8)(x−10)=x2+,(8−10)x+(8×−10)

x2+(−2)x+(−80)

x2−2x−80

hopefully its helpful for you