Question

help me doing this answers
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Answer 1

Answer:

$given \\ p = 3 \\ q = - 5 \\ r = 4 \\ {p}^{2} - qr = {3}^{2} - ( - 5) \times 4 \\ = 9 + 5 \times 4 \\ = 9 + 20 = 29 \\ {q}^{2} - 3pr \\ { - 5}^{2} - 3 \times 3 \times 4 \\ = 25 - 36 \\ = - 6$