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Annika Daniels
Mathematics
30 July, 05:01
Factor & Finding Zeros
x^{2} + 12x+35=0
+5
Answers (
1
)
Daniel
30 July, 05:06
0
x = - 7, x = - 5
Step-by-step explanation:
To factorise the quadratic
Consider the factors of the constant term ( + 35) which sum to give the coefficient of the x - term ( + 12)
The factors are + 7 and + 5, since
7 * 5 = 35 and 7 + 5 = 12, hence
x² + 12x + 35 = 0 ← in standard form
(x + 7) (x + 5) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 7 = 0 ⇒ x = - 7
x + 5 = 0 ⇒ x = - 5
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