Question

2] Write the following sets in the roaster form.
C = (x:x2 + 7x - 8 = 0, x € R} (Skill)​

Answer 1

Answer:

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Answer 2

C = {x: x^2 + 7x - 8 = 0, x€R}

Here, C is the set of all real numbers for which the equation x^2 + 7x - 8 yields zero(0).

=> x^2 + 7x - 8 = 0

=> x^2 +8x - x - 8 = 0

=> x(x+8) -1(x+8) = 0

=> (x+8)(x-1) = 0

=> x = -8 ......... or ......... x = 1

Therefore, C in roster form is:

C = {-8, 1}.