-3x - (2y)^2 pls help
1 answer:
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Answer:
(negative 7 x + 4)(negative 7 x minus 4)
Step-by-step explanation:
Consider two real numbers a and b. A difference of squares involving a and b is usually given as;
The difference of the two squares above can be factored to yield;
This implies that in order to have the difference of squares we must have a product involving the difference and the sum of the numbers.
The expression;
(negative 7 x + 4)(negative 7 x minus 4) can also be written as ( 4 - 7x) ( -4 - 7x)
( 4 - 7x) ( -4 - 7x) = ( 4 - 7x) (-1( 4 + 7x)) = -1 *( 4 - 7x) ( 4 + 7x)
Expanding the last expression yields;
-1 (16 + 28x -28x - 49x^2) = -1 (16 - 49x^2) = 49x^2 - 16 which is in deed a difference of squares
<h2>1.</h2>
So remember that with more than one pair of parentheses, you have to start from the inside and make your way outside.
Firstly, on the left side, solve 5+2 and on the right side solve 4 × 3:
Next, on the left side, solve 3 × 7 and on the right side solve the subtraction:
Lastly, solve the remaining multiplication on the left side and the answer is
<u>Since 84 is not equal to 83, the correct answer is the second option.</u>
<h2>2.</h2>For this, plug 5 into the z variable to solve.
<u>Since 15 = 15 is true, your answer is the first option.</u>
<h2>3.</h2>So for this, it's a similar process as Question 2 except that you are plugging in 0 into the x variable to solve:
<u>Since 8 = 0 is a false statement, the correct answer is the second option.</u>