the coefficient is the number before terms like x^2 and x. a is the coefficient of x^2, b is the coefficient of x, while c is the number without letters. Take not of the positive and negative sign before them.
1-3.) a=2, b=-9 , c=-5
4.) a=2, b=-8, c=0 (no number or letter is 0)
5.) convert first into general form (ax^2+bx+c=y) of quadratic equations.
(y+5) times (y-5) is y^2 -25. Subtract 4 from both sides since y=4 (the y in general form). It will the be y^2-21. a=1, b=0, c=-21. (no bx, so it's 0)
6.) Turn it into general form again. It will then be 3x^2-9x-7.
a=3, b=-9, c=-7
7. a=3, c=-1
8. a=1, b=8, c=-2
9. a=4, b=4, c=1
10. compute again into general form. It will be 2x+(x^2-3x-4)=9. Then x^2 -x-13. a= 1, b=1, c=-13 (if there is a letter but no coefficient, the coefficient is 1)
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the coefficient is the number before terms like x^2 and x. a is the coefficient of x^2, b is the coefficient of x, while c is the number without letters. Take not of the positive and negative sign before them.
1-3.) a=2, b=-9 , c=-5
4.) a=2, b=-8, c=0 (no number or letter is 0)
5.) convert first into general form (ax^2+bx+c=y) of quadratic equations.
(y+5) times (y-5) is y^2 -25. Subtract 4 from both sides since y=4 (the y in general form). It will the be y^2-21. a=1, b=0, c=-21. (no bx, so it's 0)
6.) Turn it into general form again. It will then be 3x^2-9x-7.
a=3, b=-9, c=-7
7. a=3, c=-1
8. a=1, b=8, c=-2
9. a=4, b=4, c=1
10. compute again into general form. It will be 2x+(x^2-3x-4)=9. Then x^2 -x-13. a= 1, b=1, c=-13 (if there is a letter but no coefficient, the coefficient is 1)