Determine which functions have two real number zeros by calculating the discriminant, b2 – 4ac. check all that apply. a. f(x) = x2 + 6x + 8 b. g(x) = x2 + 4x + 8 c. h(x) = x2 – 12x + 32 d. k(x) = x2 + 4x – 1 e. p(x) = 5x2 + 5x + 4 f. t(x) = x2 – 2x – 15

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Can you answer my question? will mark brainiest!

Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.