If y-a x 2 -7x-15 makes an intercept of 1 1 - 2 units on X-axis- find the value of -a-

The correct option is C 2 Intercept on X axis ⇒ y = 0 amp; x = 112 ⇒ ax^2+7x 15 = 0 amp; x = 32 #160; ⇒a = 2 #160; ...

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Standard VI

Mathematics

Formation of Algebraic Expressions

If y=a x 2 ...

Question

If $y = a x^{2} + 7 x - 15$ makes an intercept of $1 \frac{1}{2}$ units on X-axis, find the value of 'a'.

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Solution

The correct option is C $2$
Intercept on X axis $\Rightarrow y = 0$ & $x = 1 \frac{1}{2}$
$\Rightarrow a x^{2} + 7 x - 15 = 0$ & $x = \frac{3}{2}$
$\Rightarrow a = 2$

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If y=ax2+7x−15 makes an intercept of 112 units on X-axis, find the value of 'a'.

The correct option is C 2Intercept on X axis ⇒y=0 & x=112⇒ax2+7x−15=0 & x=32 ⇒a=2

If $y = a x^{2} + 7 x - 15$ makes an intercept of $1 \frac{1}{2}$ units on X-axis, find the value of 'a'.

The correct option is C $2$
Intercept on X axis $\Rightarrow y = 0$ & $x = 1 \frac{1}{2}$
$\Rightarrow a x^{2} + 7 x - 15 = 0$ & $x = \frac{3}{2}$
$\Rightarrow a = 2$