For m-3 find the value of the following expressions-i 5m3-5ii 3m2-27m-3iii 7m-20

Given m=3 .Then,i) 5m3 5 =5× 33 5 #160; =5 5 5m3 5 =0 .ii) 3m^2 27m+3 =3× 3^2 27× 3+3 =27 81+3 3m^2 27m+3 ...

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Byju's Answer

Standard X

Mathematics

Sum of N Terms of an AP

For m=3 fin...

Question

For $m = 3$ find the value of the following expressions:

i) $\frac{5 m}{3} - 5$

ii) $3 m^{2} - 27 m + 3$

iii) $7 m - 20$

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Solution

Given $m = 3$ .

Then,

i) $\frac{5 m}{3} - 5$

$= \frac{5 \times 3}{3} - 5$
$= 5 - 5$

$\frac{5 m}{3} - 5$ $= 0$ .

ii) $3 m^{2} - 27 m + 3$

$= 3 \times 3^{2} - 27 \times 3 + 3$

$= 27 - 81 + 3$

$3 m^{2} - 27 m + 3$ $= - 51$ .

iii) $7 m - 20$

$= 7 \times 3 - 20$

$= 21 - 20$

$7 m - 20$ $= 1$ .

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For m=3 find the value of the following expressions:i) 5m3−5ii) 3m2−27m+3iii) 7m−20

Given m=3.Then,i) 5m3−5=5×33−5=5−55m3−5=0.ii) 3m2−27m+3=3×32−27×3+3=27−81+33m2−27m+3=−51.iii) 7m−20=7×3−20=21−20 7m−20 =1.

For $m = 3$ find the value of the following expressions:

i) $\frac{5 m}{3} - 5$

ii) $3 m^{2} - 27 m + 3$

iii) $7 m - 20$