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Maths-

General

Easy

Question

Simplify: 4x²(7x -5) -6x²(2 -4x)+ 18x³

The correct answer is: 70x3 - 32x2

Answer:

Hint:

○ Group the like term.
○ Like terms are those whose coefficients are the same.
○ The term is decreasing in order of their power.

Step by step explanation:

○ Given:
Expression: 4x²(7x -5) -6x²(2 -4x)+ 18x³
○ Step 1:
○ simplify:
4x²(7x -5) -6x²(2 -4x)+ 18x³
$rightwards double arrow$ 28x³ - 20x² - 12x² + 24x³ + 18x³
○ Step 2:
○ Arrange the term in decreasing order of their power.
$rightwards double arrow$ 28x³+ 24x³ + 18x³ - 20x² - 12x²
$rightwards double arrow$ 70x³ - 32x²

Final Answer:

70x³ - 32x²

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