What is the factored form of the expression r^2-49

[r - 7][r + 7]

Step-by-step explanation:

Whenever you have a negative perfect square in the trinomial, like this one, that will tell you that you have to multiply conjugates, which are two monomials with additive inverses inside. Additive inverses ALWAYS result in zero, which is your B.

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6 spoons of sugar for every 21 cups of flour

step-by-step explanation:

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function