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Santosh G.

Algebra

2 months, 1 week ago

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These 2 graphs intersect at 2 points. We want to know the sum of the x values. So, let's find the point of intersection since f of x is the same thing as y and i can simply say: 3 x, plus 5 equals x, squared plus 2 x. Minus 7 point so i want to set this equal to 0 subtracting 3 x and subtracting 5. S are gonna, have 0 equals x, squared minus x, minus 12 point. This is going to factor so we're gonna factor that into x, minus 4, x plus 3, which means x, equals 4 and x, equals negative 3 when we set him equal to 0 now we're not through yet because it wants the sum of the x values. My x values are 4 and negative 3. I want to add those together. I'M going to get positive. 1.

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Lectures

01:32

In mathematics, the absolute value or modulus |x| of a real number x is its numerical value without regard to its sign. The absolute value of a number may be thought of as its distance from zero along a number line; this interpretation is analogous to the distance function assigned to a real number in the real number system. For example, the absolute value of ?4 is 4, and the absolute value of 4 is 4, both without regard to sign.

01:11

02:40

The point of intersection of the pair of straight lines represented by $6 x^{2}+5 x y-4 y^{2}+7 x+13 y-3=0$ is(a) $(1,1)$(b) $(1,-1)$(…

02:33

The coordinates of the point on the line $\mathrm{x}+\mathrm{y}=2$ that lies at unit distance from the line $2 \mathrm{x}+3 \mathrm{y}=5$ are(…

02:21

The equation of the line passing through the intersection of the lines $x+2 y-3=0$ and $4 x-y+7=0$ and parallel to the line $5 x+4 y-20=0$(a) …

10:48

Straight lines $3 x+4 y=5$ and $4 x-3 y=15$ intersect at A. Points $B$ and $C$ are choosen on these lines such that $A B=A C .$ The equation of th…

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