Question

Subtract the coefficient of z from the coefficient of z2

in the expression z2 + 8z + 15.​

Answer 1

Answer:

${z}^{2} + 8z + 15 \\ coefficient \: of \: {z}^{2} = 1 \\ coefficient \: of \:z = 8 \\ 1 - 8 = - 7$

Answer 2

$\large\sf\underline{Given\::}$

Expression :-

• $\sf\:z^{2}+8z+15$

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$\large\sf\underline{To\::}$

• Subtract the coefficient of $\sf\:z$ from $\sf\:z^{2}$ .

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$\large\sf\underline{Solution\::}$

Coefficient of $\sf\:z$ in the expression is = $\tt\purple{8}$ .

Coefficient of $\sf\:z^{2}$ in the expression is = $\tt\purple{1}$ .

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Now let's subtract the coefficient of $\sf\:z$ from $\sf\:z^{2}$ :

$\tt\multimap$ $\sf\:Coefficient\:of\:z^{2}\:-\:Coefficient\:of\:z$

$\sf\multimap\:1\:-\:8$

$\small{\underline{\boxed{\mathrm\red{\multimap\:-7}}}}$ ★

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$\tt\:More\:to\:know\::$

$\tt\color{black}{What\:is\:coefficient\:?}$

• A number which is placed in front of a variable.

For example :

$\sf\:7x$ - Here 7 is the coefficient of x since it is placed before variable x .

$\sf\:8p^{2}$ - Here 8 is the coefficient of $\sf\:p^{2}$ since it is placed before variable $\sf\:p^{2}$ .

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!! Hope it helps !!