Answer:
1&a 2&b 3&c 4&d
Step-by-step explanation:
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Answer:
trapezium................
<em>The discriminant must be zero.</em>
Step-by-step explanation:
A Perfect-Square Trinomial is given by the form:

The discriminant in the quadratic formula is:

So in order to get a perfect square,<em> the discriminant must be zero.</em>
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Discriminant: brainly.com/question/1537997
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The slope is the first choice you chose