Which polynomial is the perfect square trinomial? And why??? Help Please!!
1 answer:
<h3>Answer:</h3>
See the attached
<h3>Step-by-step explanation:</h3>When you square the binomial (a -b), you get ...
... (a -b)² = a² -2ab +b²
That is, both the a² and b² terms have positive signs, and the middle term is twice the product of the roots of the squared terms.
The last two selections have negative signs on the constant, so cannot be perfect square trinomials.
The first selection has a middle term that is -ab, not -2ab, so it is not a perfect square trinomial, either.
The second selection is the correct one:
... 4a² -20a +25 = (2a +5)²
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Answer:
0.33 liters of water Bao use per liter of flour.
3 liters of flour Bao use per liter of water
Step-by-step explanation:
Given the graph which pass through the coordinates (0,0) and (3,1)
∴ Equation of line passing through these points can be written as
⇒
⇒ ⇒
Now, we have to find liters of water Bao use per liter of flour i.e if x=1 then we find the value of y which is 3y=x=1 ⇒
Now, we have to find liters of flour Bao use per liter of water i.e if y=1 the we have to find the value of x which is x=3 litre