Q. Simplify the following expression completely.x2−19x+90x2−16x+63Answer:
Factor Numerator: Factor the numerator x2−16x+63. We look for two numbers that multiply to 63 and add up to −16. These numbers are −7 and −9. So, x2−16x+63 can be factored as (x−7)(x−9).
Factor Denominator: Factor the denominator x2−19x+90. We look for two numbers that multiply to 90 and add up to −19. These numbers are −10 and −9. So, x2−19x+90 can be factored as (x−10)(x−9).
Simplify Expression: Simplify the expression by canceling out common factors.We have (x−7)(x−9)/(x−10)(x−9). The (x−9) terms cancel out, leaving us with (x−7)/(x−10).
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