Question

1. Find 3p+4q2-5 when p=3 and q=-2.​

Answer 1

=3×3+4×-2×2-5

=9-16-5

=-12.

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Answer 2

Given,

3p + 4q² - 5.

To find,

Value of the expression, when p = 3, and q = -2.

Solution,

Firstly, let the expression be X. That is,

X = 3p + 4q² - 5

Now, to find the value of X at the given values we can simply put these in the expression for X.

So, substituting p = 3, and q = -2 in X, we get,

X = 3(3) + 4(-2)² - 5

Simplifying the above expression,

X = 9 + 4(4) - 5

X = 9 + 16 - 5

X = 25 - 5

X = 20.

Therefore, for p = 3, and q = -2, the value of the given expression will be 20.