Question

Given the algebraic expression 5x + a² - x² , what is its numerical value for x = 2 and a = 3
a) 20
b) 18
c) 15
d) 12​

Answer 1

hi brainly user! ૮₍ ˃ ⤙ ˂ ₎ა

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$\large \bold {ANSWER}$

$\implies \boxed{\underline{\huge{\tt{\orange{\: \: c)15 \: \: }}}}}$

$\large \bold {SOLUTION}$

Having substituted the values of "x" and "a" in the algebraic expression, 15 was obtained as a numerical value.

To obtain the numerical value of the algebraic expression,

one must substitute in the same, the values of "x" and "a" respectively.

$\begin{gathered}5x + a^2 - x^2\\\\5.2 + 3^2 - 2^2\\\\10 + 9 - 4\\\\19 - 4\\\\15 \\\end{gathered}$

Answer 2

Substitute x = 2 and a = 3

5 (2) + 9 -4 ( I squared the a as 3x3 = 9. And the 2 squared is 2 x2 =4)
10+ 9 -4
19-4
15

15 is correct answer c

Have a great day!