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The sum of a number and its square is 90 Find the number?
Use any letter for the number, for example, x. The equation is:x + x2 = 90This should be converted to standard form before proceeding:x2 + x = 90x2 + x - 90 = 0This can easily be factored. You need two numbers (one positive, one negative), whose sum is +1, and whose product is -90.(x + 10)(x - 9) = 0This gives you two solutions for x:x + 10 = 0x = -10or:x - 9 = 0x = 9Note: it is quite common for a quadratic equation to have two solutions.Use any letter for the number, for example, x. The equation is:x + x2 = 90This should be converted to standard form before proceeding:x2 + x = 90x2 + x - 90 = 0This can easily be factored. You need two numbers (one positive, one negative), whose sum is +1, and whose product is -90.(x + 10)(x - 9) = 0This gives you two solutions for x:x + 10 = 0x = -10or:x - 9 = 0x = 9Note: it is quite common for a quadratic equation to have two solutions.Use any letter for the number, for example, x. The equation is:x + x2 = 90This should be converted to standard form before proceeding:x2 + x = 90x2 + x - 90 = 0This can easily be factored. You need two numbers (one positive, one negative), whose sum is +1, and whose product is -90.(x + 10)(x - 9) = 0This gives you two solutions for x:x + 10 = 0x = -10or:x - 9 = 0x = 9Note: it is quite common for a quadratic equation to have two solutions.Use any letter for the number, for example, x. The equation is:x + x2 = 90This should be converted to standard form before proceeding:x2 + x = 90x2 + x - 90 = 0This can easily be factored. You need two numbers (one positive, one negative), whose sum is +1, and whose product is -90.(x + 10)(x - 9) = 0This gives you two solutions for x:x + 10 = 0x = -10or:x - 9 = 0x = 9Note: it is quite common for a quadratic equation to have two solutions.
What is the most challenging math equation in the world?
46x by 87y -------------- √ 90 Tips: If you move that 46x over the equals, and if you square both sides, you can get rid of that square root, and do the equation normally.
What plus 90 equals 180?
Oh, that's a happy little math problem! If you have a number that, when added to 90, equals 180, you're looking for the missing piece to complete the puzzle. In this case, that number is 90, because 90 + 90 equals 180. Just like adding a touch of color to bring a painting to life, you've found the perfect balance to make the equation complete.
What times 9 equals 90?
Well, darling, if you can't figure out what times 9 equals 90, then we've got bigger problems on our hands. The answer is 10, in case you were wondering. But hey, no judgment here - math can be a real pain in the behind sometimes.
90 plus b equals 2x70 so b equals?
90+b=2x70 90+b=140 90-90+b=140-90 b=50
