If C=x^{2}+7C=x 2 +7 and D=3x^{2}-4x+3,D=3x 2 −4x+3, find an expression that equals 3C+3D3C+3D in standard form.
1 answer:
Answer:
3C + 3D = 12x² -12x + 30
Step-by-step explanation:
Given
To determine
The expression is given by
3C + 3D
substituting C = x² + 7 and D = 3x² - 4x + 3
= 3(x² + 7) + 3(3x² - 4x + 3)
= 3x² + 21 + 9x² - 12x + 9
= 12x² -12x + 30
Thus, the expression in standard form is:
3C + 3D = 12x² -12x + 30
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