Question
Factorise:
81x4 - y4
81x4 - y4
✓
Answer
81x4 - y4
= (9x2)2 - (y2)2
= (9x2 - y2)(9x2 + y2)
= [(3x)2 - y2](9x2 + y2)
= (3x - y)(3x + y)(9x2 + y2)
= (9x2)2 - (y2)2
= (9x2 - y2)(9x2 + y2)
= [(3x)2 - y2](9x2 + y2)
= (3x - y)(3x + y)(9x2 + y2)
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Read the Source/ Text given below and answer these questions:
Rohit was putting up one of his paintings in his living room. Before this Rohit had put a grid on the wall where each unit measured equal to a foot. The upper-left corner of the frame is at point C(1, 8) and the upper-right corner at D(7, 8). The bottom-left corner is at A(1, 2) and the bottom-right corner at B(7, 2).
questions:
1. What is the width of the painting plus frame?
2. What is the length of the painting plus frame?
Rohit was putting up one of his paintings in his living room. Before this Rohit had put a grid on the wall where each unit measured equal to a foot. The upper-left corner of the frame is at point C(1, 8) and the upper-right corner at D(7, 8). The bottom-left corner is at A(1, 2) and the bottom-right corner at B(7, 2).
questions:
1. What is the width of the painting plus frame?
2. What is the length of the painting plus frame?
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