How do you solve this problem?
title="x ^{2} - 2x - 3" alt="x ^{2} - 2x - 3" align="absmiddle" class="latex-formula">
2 answers:
Answer:
hello :
x² - 2x - 3 = ( x² -2x +1 ) - 2²
= ( x - 1 )² -2²
= ( x - 1 - 2 ) ( x - 1 +2).....by idetity : a² - b² = (a - b) ( a + b )
= ( x - 3 ) ( x + 1)
x² - 2x - 3 = 0 : x - 3 = 0 or x + 1 = 0
so : x = 3 or x = -1
Answer:
x = - 1, x = 3
Step-by-step explanation:
Consider the factors of the constant term ( - 3) which sum to give the coefficient of the x- term (- 2)
The factors are - 3 and + 1
(x - 3)(x + 1) ← in factored form
To solve equate to zero, that is
(x - 3)(x + 1) = 0
Equate each factor to zero and solve for x
x - 3 = 0 ⇒ x = 3
x + 1 = 0 ⇒ x = - 1
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Answer:
The number is 58
Step-by-step explanation:
31+27
58
58-31=27
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5x=91
x= 91/5 brushes
2.45 rounded to the nearest hundredth would still be 2.45. Unless there are other digits that come after the 5?
Answer:
A≈ 268.76 sq cm.
Step-by-step explanation:
sine 27 = opposite side/hypotenuse
sine 27 = x/40
sin 27(40) = x
18.15961999 =x
18.16 = x
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A = 268.7623759
A≈ 268.76 sq cm.
Hi I just need points jeje