What is the answer for -4-(7t-4)^2=-49
1 answer:
<em>t₁ = (3√5 + 4)/7</em>
<em>t₂ = -(3√5 - 4)/7</em>
- Step-by-step explanation:
<em>- 4 - (7t - 4)² = - 49</em>
<em>- (7t - 4)² = - 49 + 4</em>
<em>- (7t - 4) = - 45 | (-)</em>
<em>(7t - 4)² = 45</em>
<em>(7t - 4)² = 3√5</em>
<em>7t - 4 = ± 3√5</em>
- <em> 7t - 4 = 3√5 => 7t = 3√5 + 4 => t₁ = (3√5 + 4)/7</em>
- <em> 7t - 4 = - 3√5 => 7t = - 3√5 + 4 => t₂ = -(3√5 - 4)/7</em>
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