Question

The solution set of x² - 4x - 21 less than are equal to 0 is​

Answer 1

Answer:

7, -3

Step-by-step explanation:

p(7) = 7² -28 -21

=0

p(-3) = -3² +12 -21

=0

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Answer 2

1. x^2 -(3-7)x-21= x^2-3x+7x-21=(x^2-3x)+(7x-21) = x(x-3)+7(x-3) = (x-3) (x+7) answer