Question

if a = 5 find the value of the 3 x square - 2 a- 5​

Answer 1

$\huge\fbox\purple{Answer}$

$a = 5 \\ 3 {x}^{2} - 2a - 5 \\ 3 {x}^{2} - 2(5) - 5 \\ 3 {x}^{2} - 10 - 5 \\ 3 {x}^{2} - 15 = 0$

$x = ±\sqrt{5}$

Answer 2

Answer:

${ \green{ \bf{✓Verified \: Answer}}}$

$3x {}^{2} - 2a - 5$

$a = 5$

$3x {}^{2} - 2(5) - 5$

$3x {}^{2} - 10 - 5$

$3x {}^{2} - 15 = 0$

$x {}^{2} = \frac{15}{3}$

$x {}^{2} = 5$

$x = \sqrt{5}$

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