Answer:
4x^2 - 3x - 28 (using identity of (x + a)(x + b))
Step-by-step explanation:
We know the identity-
[tex](x + a)(x + b) = {x}^{2} + (a + b)x + ab[/tex]
Using this, we find
In this case-
x = 2x
a = 4
b = -7
[tex](2x) {}^{2} + (4 + ( - 7))x + 4 \times - 7[/tex]
Which is
[tex]4 {x}^{2} - 3x - 28[/tex]
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Answers & Comments
Answer:
4x^2 - 3x - 28 (using identity of (x + a)(x + b))
Step-by-step explanation:
We know the identity-
[tex](x + a)(x + b) = {x}^{2} + (a + b)x + ab[/tex]
Using this, we find
In this case-
x = 2x
a = 4
b = -7
[tex](2x) {}^{2} + (4 + ( - 7))x + 4 \times - 7[/tex]
Which is
[tex]4 {x}^{2} - 3x - 28[/tex]