Question

pleqse give the right ​

Answer 1

Step-by-step explanation:

1)True

Reason:-

the only one square number between 160 and 170 is 169=13²

2)False

Reason:-

87²

the unit place is 7

the square of 7=7²=49

Unit place of 87²=9

3)False

Reason:-

If CP>SP then we get loss

Loss=CP-SP

4)False

Reason:-

(3x-4y)²

=>(3x)²-2(3x)(4y)+(4y)²

=>9x²-24xy+16y²

5)True

Reason:-

By Pythagoras theorem

(2m)²+(m²-1)²

=>4m²+m⁴-2m²+1

=>m⁴+2m²+1

=>(m²)²+2(m²)(1)+1²

This is in the form of (a+b)²

=>(m²+1)²

It is true

6) False

Reason:-

(3xy+4xy²+z)-(2xy+3xy²+2z)

=>3xy-2xy+4xy²-3xy²+z-2z

=>xy+xy²-z