4 years ago

What if the discriminat of the equation 0=2x2+3x-5

Mathematics

1 answer:

Ivan4 years ago

5 0

$2x^2 +3x -5$

a: 2

b: 3

c: -5

<h2>FORMULA</h2>

$\boxed{\Delta = b^2 - 4ac}$

Using it

$\Delta = 3^2 - 4 \times 2 \times (-5)$

Squaring and multiplying

$\Delta = 9 +40$

Addition

$\boxed {\Delta = 49}$

The discriminant is 49.

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for all values of x , a function f is defined by f(x)=x^2+7x+12 if f(a)=2, what could be the value of a?

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Answer:

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Step-by-step explanation:

We want $f(a) = a^2 + 7a + 12 = 2$ . We can subtract 2 from both sides of this equation to get $a^2+7a+10=0$ . We can factor this to get that $(a+2)(a+5)=0$ . When the product of two numbers is equal to zero, one of the numbers must be equal to zero. This means that either a + 2 = 0, in which case a = -2, or a + 5 = 0, in which case a = -5.