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3 years ago

A rectangle Is (2x-3) cm long and (x+7) cm wide. What Is It's area?

Mathematics

2 answers:

krok68 [10]3 years ago

6 0

Answer:

$2x^{2}$ + 11x -21 $cm^{2}$

Step-by-step explanation:

Area of a rectangle = Length × Width

= (2x-3)(x+7)

Multiply 2x with x, 2x with +7, -3 with x and -3 with +7

= $2x^{2}$ + 14x - 3x - 21

= $2x^{2}$ + 11x -21 $cm^{2}$

Nikitich [7]3 years ago

4 0

Answer:

Step-by-step explanation:

Length (L)= 2x - 3 cm

Breadth (b) = x + 7 cm

Area of the rectangle

= L * b

= ( 2x - 3)(x+ 7)

= 2x(x + 7) - 3(x + 7)

= 2x² + 14x - 3x - 21

=( 2x² + 11x - 21) cm²

hope it helps

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What is the substitution of<br><img src="https://tex.z-dn.net/?f=%28x%20%20-%20%201%29%5E%7B2%7D%20" id="TexFormula1" title="(x

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A rectangle Is (2x-3) cm long and (x+7) cm wide. What Is It's area?​

A rectangle Is (2x-3) cm long and (x+7) cm wide. What Is It's area?