ans i will mark as brainliests answer in 5 min ans
Answers
Answer:
9x²-49y²
Step-by-step explanation:
(a+b)(a-b)=a²+ab-ab+b²
=a²-b²
Answer:
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Step-by-step explanation:
Distribute
(
3
+
7
)
(
3
−
7
)
{\color{#c92786}{(3x+7y)(3x-7y)}}
(3x+7y)(3x−7y)
3
(
3
−
7
)
+
7
(
3
−
7
)
{\color{#c92786}{3x(3x-7y)+7y(3x-7y)}}
3x(3x−7y)+7y(3x−7y)
2
Distribute
3
(
3
−
7
)
+
7
(
3
−
7
)
{\color{#c92786}{3x(3x-7y)}}+7y(3x-7y)
3x(3x−7y)+7y(3x−7y)
9
2
−
2
1
+
7
(
3
−
7
)
{\color{#c92786}{9x^{2}-21xy}}+7y(3x-7y)
9x2−21xy+7y(3x−7y)
3
Distribute
9
2
−
2
1
+
7
(
3
−
7
)
9x^{2}-21xy+{\color{#c92786}{7y(3x-7y)}}
9x2−21xy+7y(3x−7y)
9
2
−
2
1
+
2
1
−
4
9
2
9x^{2}-21xy+{\color{#c92786}{21xy-49y^{2}}}
9x2−21xy+21xy−49y2
4
Combine like terms
9
2
−
2
1
+
2
1
−
4
9
2
9x^{2}{\color{#c92786}{-21xy}}+{\color{#c92786}{21xy}}-49y^{2}
9x2−21xy+21xy−49y2
9
2
−
4
9
2
9x^{2}{\color{#c92786}{-49y^{2}}}
9x2−49y2
Solution
9
2
−
4
9
2
