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Two squares sides have x centimetre and X + 4 centimeter.the sum of their area is 655 |
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Answer» LENGTH of SIDE of first SQUARE = x cm length of side of second square = x + 4 cm sum of the area of the two squares is 655cm² So, we can also WRITE it as, (x)² + (x + 4)² = 655 x² + x² + (4)² + 2(x)(4) = 655 2x² + 16 + 8x = 655 2x² + 8x = 655 - 16 2x² + 8x = 639 2x² + 8x - 639 = 0 By using QUADRATIC formula, x = [b ± √(b² - 4ac)]/2a x = [8 ± √((8)² - 4×2×639)]/2×2 x = [8 ± √(64 - 5112)]/4 |
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