<span>Part A: First, we factor out a^2 to obtain: a^2 [5x^2 - 19x - 4] = a^2[(5x+1)(x-4)]
Part B: By inspection, we can use the factors (x+7)(x+7). To check that we have indeed chosen correctly, we will multiply our factors to obtain x^2 + 7x + 7x + 49 =
x^2 + 14x + 49 = 0, which is correct.
Part C: Again, we can use trial and error and try the factors (x+10)(x-10). Multiplying throughout, we obtain x^2 + 10x - 10x - 100 = x^2 -100.</span>
Answer:
B, A or D
Explanation:
Examples of secondary sources include: journal articles that comment on or analyse research. textbooks. dictionaries and encyclopaedias.
The Bible, not the Pope was the supreme authority of the Church
Reconciling with the south rather than punishing it
