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Exercise

$7x^2-2x\:para\:x=2$

Step-by-step Solution

1

Calculate the numerical value for $7x^2-2x$ when $x=2$. Replace the unknowns with their corresponding values

$7\cdot 2^2-2\cdot 2$
2

Multiply $-2$ times $2$

$7\cdot 2^2-4$
3

Calculate the power $2^2$

$7\cdot 4-4$
4

Multiply $7$ times $4$

$28-4$
5

Subtract the values $28$ and $-4$

$24$

Final answer to the exercise

$24$

Try other ways to solve this exercise

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  • Product of Binomials with Common Term
  • FOIL Method
  • Integrate by substitution
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  • Integrate by trigonometric substitution
  • Weierstrass Substitution
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Similar Questions Solved

$y'\left(x\right)=x^3\cdot y\:;\:y\left(0\right)=1$

$y=\frac{4}{x},\:x=1,\:x=2$

$x=0,y=1$

$28-2m,\:con\:m=7$

$-\left(x-y+1\right)^2,yo=1$

$23x,para\:x=4$

$y\:=\:3x2\:-\:6,\:si\:x=-2\:$

Main Topic: Numerical value of an algebraic expression

The numerical value of an algebraic expression is the result obtained by substituting the variables by a numerical value given.

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