Use the zero product property to find the solutions to the equation x^2 + x – 30 = 12. x = –7 or x = 6 x = –7 or x = –6 x = –6 or x = 7 x = 6 or x = 7

x2 + x - 30 = 12

x2 + x - 42 = 0

(x + 7)(x - 6) = 0

By zero product property, either (x + 7) = 0 or (x - 6) = 0.

So x = -7/6.

x = - 7 or x = 6

Step-by-step explanation:

given

x² + x - 30 = 12 ( subtract 12 from both sides )

x² + x - 42 = 0 ← in standard form

To factorise, consider the factors of the constant term (- 42) which sum to give the coefficient of the x- term (+ 1)

The factors are + 7 and - 6, since

+ 7 × - 6 = - 42 and + 7 - 6 = + 1, hence

(x + 7)(x - 6) = 0

Equate each factor to zero and solve for x ( zero product property )

x + 7 = 0 ⇒ x = - 7

x - 6 = 0 ⇒ x = 6

idk what the answer is but for the points

step-by-step explanation:

the first one and the second one that's the answer

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is: