The polyatomic ion with the formula hpo42- is called

hydrogen phosphate

Step-by-step explanation:

Answer : The polyatomic ion with the formula is called hydrogen phsophate ions.

Explanation :

The rules for naming the ionic compounds with polyatomic ion is given as :

In , hydrogen ion combine with phosphate ion to give hydrogen phosphate ion.

Hence, the polyatomic ion with the formula is called hydrogen phsophate ions.

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

the answer to question 1 is -8, 28.

step-by-step explanation: