If m∠A = m∠B and m∠A + m∠C = m∠D, then m∠B + m∠C = m∠D.
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Answer:
x = ± 1
Step-by-step explanation:
Given
3(x² - 4) + 7 = - 2 ( subtract 7 from both sides )
3(x² - 4) = - 9 ( divide both sides by 3 )
x² - 4 = - 3 ( add 4 to both sides )
x² = 1 ( take the square root of both sides )
x² = ± = ± 1
Thus
x = - 1, x = 1
now, the one below that, which is equivalent to that? well, just look above it