SOLUTION: To factor x^2-8x-20, we must find two numbers whose product is p and whose sum is q. p and q are:
1) p=-20, q=-8
2) p=10, q=-2
3) p=-10, q=-2
4) p=-10. q=2
Algebra ->
Polynomials-and-rational-expressions
-> SOLUTION: To factor x^2-8x-20, we must find two numbers whose product is p and whose sum is q. p and q are:
1) p=-20, q=-8
2) p=10, q=-2
3) p=-10, q=-2
4) p=-10. q=2
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Question 153674: To factor x^2-8x-20, we must find two numbers whose product is p and whose sum is q. p and q are:
1) p=-20, q=-8
2) p=10, q=-2
3) p=-10, q=-2
4) p=-10. q=2
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Since pq is negative, either p or q must be negative.
Since p+q is negative, the larger factor is negative.
1 is not the solution, pq=160
2 is not the solution, p+q=8
3 is not the solution, pq=20
4 is the solution, pq=-20, p+q=-8
4)p=-10, q=2
